diff --git a/man/binfmt.d.xml b/man/binfmt.d.xml
index 5b63cfb4c3..5f55cb4db2 100644
--- a/man/binfmt.d.xml
+++ b/man/binfmt.d.xml
@@ -2,6 +2,8 @@
 <!--*-nxml-*-->
 <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2011 Lennart Poettering
diff --git a/man/bootctl.xml b/man/bootctl.xml
index 675e0174e9..b3b63fa255 100644
--- a/man/bootctl.xml
+++ b/man/bootctl.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   systemd is free software; you can redistribute it and/or modify it
diff --git a/man/bootup.xml b/man/bootup.xml
index b92c60f43a..56f4f57097 100644
--- a/man/bootup.xml
+++ b/man/bootup.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2012 Lennart Poettering
diff --git a/man/busctl.xml b/man/busctl.xml
index 28b36f09d0..2446a8caa4 100644
--- a/man/busctl.xml
+++ b/man/busctl.xml
@@ -3,6 +3,8 @@
 "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2014 Zbigniew Jędrzejewski-Szmek
diff --git a/man/coredump.conf.xml b/man/coredump.conf.xml
index 5f61e05f40..097296059f 100644
--- a/man/coredump.conf.xml
+++ b/man/coredump.conf.xml
@@ -3,6 +3,8 @@
         "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2014 Zbigniew Jędrzejewski-Szmek
diff --git a/man/coredumpctl.xml b/man/coredumpctl.xml
index 5bbd5222af..73f4b87dac 100644
--- a/man/coredumpctl.xml
+++ b/man/coredumpctl.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2012 Zbigniew Jędrzejewski-Szmek
diff --git a/man/crypttab.xml b/man/crypttab.xml
index 3aebd7ea90..474d3d83e0 100644
--- a/man/crypttab.xml
+++ b/man/crypttab.xml
@@ -2,6 +2,8 @@
 <!--*-nxml-*-->
 <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2012 Lennart Poettering
diff --git a/man/custom-html.xsl b/man/custom-html.xsl
index e89d73e7f1..47ce6abfee 100644
--- a/man/custom-html.xsl
+++ b/man/custom-html.xsl
@@ -1,6 +1,8 @@
 <?xml version='1.0'?> <!--*-nxml-*-->
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2011 Lennart Poettering
diff --git a/man/custom-man.xsl b/man/custom-man.xsl
index e1b8d3618a..3307fd3c0d 100644
--- a/man/custom-man.xsl
+++ b/man/custom-man.xsl
@@ -1,6 +1,8 @@
 <?xml version='1.0'?> <!--*-nxml-*-->
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2013 Zbigniew Jędrzejewski-Szmek
diff --git a/man/daemon.xml b/man/daemon.xml
index 485c66225e..5b782c88a5 100644
--- a/man/daemon.xml
+++ b/man/daemon.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2010 Lennart Poettering
diff --git a/man/dnssec-trust-anchors.d.xml b/man/dnssec-trust-anchors.d.xml
index 6e90e6aef9..d6e488065b 100644
--- a/man/dnssec-trust-anchors.d.xml
+++ b/man/dnssec-trust-anchors.d.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2016 Lennart Poettering
diff --git a/man/environment.d.xml b/man/environment.d.xml
index ad9db1666f..c050061abc 100644
--- a/man/environment.d.xml
+++ b/man/environment.d.xml
@@ -2,6 +2,8 @@
 <!--*-nxml-*-->
 <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2016 Red Hat, Inc.
diff --git a/man/file-hierarchy.xml b/man/file-hierarchy.xml
index ab52ccfe0c..b1442dd82c 100644
--- a/man/file-hierarchy.xml
+++ b/man/file-hierarchy.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2014 Lennart Poettering
diff --git a/man/glib-event-glue.c b/man/glib-event-glue.c
index 8f3168d0ea..32d8e921b8 100644
--- a/man/glib-event-glue.c
+++ b/man/glib-event-glue.c
@@ -1,4 +1,6 @@
 /***
+  SPDX-License-Identifier: MIT
+
   Copyright 2014 Tom Gundersen
 
   Permission is hereby granted, free of charge, to any person
diff --git a/man/halt.xml b/man/halt.xml
index e3fa60a915..3ba151f927 100644
--- a/man/halt.xml
+++ b/man/halt.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2010 Lennart Poettering
diff --git a/man/hostname.xml b/man/hostname.xml
index 8a4c0d5ac0..7b0fd29237 100644
--- a/man/hostname.xml
+++ b/man/hostname.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2010 Lennart Poettering
diff --git a/man/hostnamectl.xml b/man/hostnamectl.xml
index 81bce2da6a..fa70d5cc6c 100644
--- a/man/hostnamectl.xml
+++ b/man/hostnamectl.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2012 Lennart Poettering
diff --git a/man/journal-remote.conf.xml b/man/journal-remote.conf.xml
index f7ac8c46e0..ed49c39f35 100644
--- a/man/journal-remote.conf.xml
+++ b/man/journal-remote.conf.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2015 Chris Morgan
diff --git a/man/journal-upload.conf.xml b/man/journal-upload.conf.xml
index e3be62dfd1..bbb6df503b 100644
--- a/man/journal-upload.conf.xml
+++ b/man/journal-upload.conf.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2016 Zbigniew Jędrzejewski-Szmek
diff --git a/man/journalctl.xml b/man/journalctl.xml
index c80e0ed1c2..089fb1378f 100644
--- a/man/journalctl.xml
+++ b/man/journalctl.xml
@@ -3,6 +3,8 @@
         "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2012 Lennart Poettering
diff --git a/man/journald.conf.xml b/man/journald.conf.xml
index fa3694d3b4..844228e324 100644
--- a/man/journald.conf.xml
+++ b/man/journald.conf.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2010 Lennart Poettering
diff --git a/man/kernel-command-line.xml b/man/kernel-command-line.xml
index 4ab76487df..1864895ee2 100644
--- a/man/kernel-command-line.xml
+++ b/man/kernel-command-line.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2012 Lennart Poettering
diff --git a/man/kernel-install.xml b/man/kernel-install.xml
index 94b6b1110d..fa86a3aaa0 100644
--- a/man/kernel-install.xml
+++ b/man/kernel-install.xml
@@ -3,6 +3,8 @@
 "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2013 Harald Hoyer
diff --git a/man/libudev.xml b/man/libudev.xml
index 53b68dcc89..e92db55759 100644
--- a/man/libudev.xml
+++ b/man/libudev.xml
@@ -6,6 +6,8 @@
 ]>
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2015 David Herrmann <dh.herrmann@gmail.com>
diff --git a/man/locale.conf.xml b/man/locale.conf.xml
index 1405dda3fd..cd349acdcd 100644
--- a/man/locale.conf.xml
+++ b/man/locale.conf.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2010 Lennart Poettering
diff --git a/man/localectl.xml b/man/localectl.xml
index 7da12c29de..8588541041 100644
--- a/man/localectl.xml
+++ b/man/localectl.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2012 Lennart Poettering
diff --git a/man/localtime.xml b/man/localtime.xml
index 2827da6e93..0341c61614 100644
--- a/man/localtime.xml
+++ b/man/localtime.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2010 Lennart Poettering
diff --git a/man/loginctl.xml b/man/loginctl.xml
index 617852dfa7..65c5227ed3 100644
--- a/man/loginctl.xml
+++ b/man/loginctl.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2010 Lennart Poettering
diff --git a/man/logind.conf.xml b/man/logind.conf.xml
index 16f51af72c..8d2bfc5d5b 100644
--- a/man/logind.conf.xml
+++ b/man/logind.conf.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2010 Lennart Poettering
diff --git a/man/machine-id.xml b/man/machine-id.xml
index e434c89de9..3d82a3edaf 100644
--- a/man/machine-id.xml
+++ b/man/machine-id.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2010 Lennart Poettering
diff --git a/man/machine-info.xml b/man/machine-info.xml
index cd5997d4e2..b9f4fa821e 100644
--- a/man/machine-info.xml
+++ b/man/machine-info.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2010 Lennart Poettering
diff --git a/man/machinectl.xml b/man/machinectl.xml
index 8c71880cf2..73fc5a68f6 100644
--- a/man/machinectl.xml
+++ b/man/machinectl.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2013 Zbigniew Jędrzejewski-Szmek
diff --git a/man/modules-load.d.xml b/man/modules-load.d.xml
index 4b722aa128..0dd0c3c161 100644
--- a/man/modules-load.d.xml
+++ b/man/modules-load.d.xml
@@ -2,6 +2,8 @@
 <!--*-nxml-*-->
 <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2011 Lennart Poettering
diff --git a/man/networkctl.xml b/man/networkctl.xml
index d4fa5e9029..33e0629d80 100644
--- a/man/networkctl.xml
+++ b/man/networkctl.xml
@@ -3,6 +3,8 @@
 "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2015 Zbigniew Jędrzejewski-Szmek
diff --git a/man/networkd.conf.xml b/man/networkd.conf.xml
index 57e647a31b..8a16058161 100644
--- a/man/networkd.conf.xml
+++ b/man/networkd.conf.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2014 Vinay Kulkarni
diff --git a/man/nss-myhostname.xml b/man/nss-myhostname.xml
index 2b180a37cb..bf3ea405a1 100644
--- a/man/nss-myhostname.xml
+++ b/man/nss-myhostname.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2011 Lennart Poettering
diff --git a/man/nss-mymachines.xml b/man/nss-mymachines.xml
index 00bcc53ec0..dc3076ab0d 100644
--- a/man/nss-mymachines.xml
+++ b/man/nss-mymachines.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2014 Lennart Poettering
diff --git a/man/nss-resolve.xml b/man/nss-resolve.xml
index f88c25c453..edd4e9d32e 100644
--- a/man/nss-resolve.xml
+++ b/man/nss-resolve.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2011 Lennart Poettering
diff --git a/man/nss-systemd.xml b/man/nss-systemd.xml
index 34811f0a2e..0114a6f936 100644
--- a/man/nss-systemd.xml
+++ b/man/nss-systemd.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2016 Lennart Poettering
diff --git a/man/os-release.xml b/man/os-release.xml
index 99bbb61004..b0468c16a0 100644
--- a/man/os-release.xml
+++ b/man/os-release.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2010 Lennart Poettering
diff --git a/man/pam_systemd.xml b/man/pam_systemd.xml
index cef5445c1c..f45631688c 100644
--- a/man/pam_systemd.xml
+++ b/man/pam_systemd.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2010 Lennart Poettering
diff --git a/man/resolved.conf.xml b/man/resolved.conf.xml
index 1846df7502..451b9cdd01 100644
--- a/man/resolved.conf.xml
+++ b/man/resolved.conf.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2014 Tom Gundersen
diff --git a/man/runlevel.xml b/man/runlevel.xml
index 50fdacde00..b3d90d8ff4 100644
--- a/man/runlevel.xml
+++ b/man/runlevel.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2010 Lennart Poettering
diff --git a/man/sd-bus-errors.xml b/man/sd-bus-errors.xml
index 055af7a682..a655ab1d97 100644
--- a/man/sd-bus-errors.xml
+++ b/man/sd-bus-errors.xml
@@ -3,6 +3,8 @@
 "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2015 Lennart Poettering
diff --git a/man/sd-bus.xml b/man/sd-bus.xml
index 6439395549..48d62d466f 100644
--- a/man/sd-bus.xml
+++ b/man/sd-bus.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2016 Zbigniew Jędrzejewski-Szmek
diff --git a/man/sd-daemon.xml b/man/sd-daemon.xml
index b06d99f346..151d89e698 100644
--- a/man/sd-daemon.xml
+++ b/man/sd-daemon.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2010 Lennart Poettering
diff --git a/man/sd-event.xml b/man/sd-event.xml
index 24a69bb645..2518050570 100644
--- a/man/sd-event.xml
+++ b/man/sd-event.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2015 Lennart Poettering
diff --git a/man/sd-id128.xml b/man/sd-id128.xml
index bc74e3f481..bd27237978 100644
--- a/man/sd-id128.xml
+++ b/man/sd-id128.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2012 Lennart Poettering
diff --git a/man/sd-journal.xml b/man/sd-journal.xml
index 0f4b3e8eea..52f99c7f4c 100644
--- a/man/sd-journal.xml
+++ b/man/sd-journal.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2012 Lennart Poettering
diff --git a/man/sd-login.xml b/man/sd-login.xml
index b2131a9af9..148dd19cea 100644
--- a/man/sd-login.xml
+++ b/man/sd-login.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2010 Lennart Poettering
diff --git a/man/sd_booted.xml b/man/sd_booted.xml
index 4dd674b8ea..54a9de894b 100644
--- a/man/sd_booted.xml
+++ b/man/sd_booted.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2010 Lennart Poettering
diff --git a/man/sd_bus_add_match.xml b/man/sd_bus_add_match.xml
index 2014141ae3..4772c738ac 100644
--- a/man/sd_bus_add_match.xml
+++ b/man/sd_bus_add_match.xml
@@ -3,6 +3,8 @@
 "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2016 Julian Orth
diff --git a/man/sd_bus_creds_get_pid.xml b/man/sd_bus_creds_get_pid.xml
index 56e62863f2..6bc78edf07 100644
--- a/man/sd_bus_creds_get_pid.xml
+++ b/man/sd_bus_creds_get_pid.xml
@@ -3,6 +3,8 @@
 "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2014 Zbigniew Jędrzejewski-Szmek
diff --git a/man/sd_bus_creds_new_from_pid.xml b/man/sd_bus_creds_new_from_pid.xml
index b4d7d61d0f..5cdff073ea 100644
--- a/man/sd_bus_creds_new_from_pid.xml
+++ b/man/sd_bus_creds_new_from_pid.xml
@@ -3,6 +3,8 @@
 "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2014 Zbigniew Jędrzejewski-Szmek
diff --git a/man/sd_bus_default.xml b/man/sd_bus_default.xml
index d9102a36ce..62520ff4dd 100644
--- a/man/sd_bus_default.xml
+++ b/man/sd_bus_default.xml
@@ -3,6 +3,8 @@
 "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2014 Zbigniew Jędrzejewski-Szmek
diff --git a/man/sd_bus_error.xml b/man/sd_bus_error.xml
index 4970ce3c08..ef40178f1f 100644
--- a/man/sd_bus_error.xml
+++ b/man/sd_bus_error.xml
@@ -3,6 +3,8 @@
 "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2014 Zbigniew Jędrzejewski-Szmek
diff --git a/man/sd_bus_error_add_map.xml b/man/sd_bus_error_add_map.xml
index a1eda21ed5..b79381fefd 100644
--- a/man/sd_bus_error_add_map.xml
+++ b/man/sd_bus_error_add_map.xml
@@ -3,6 +3,8 @@
 "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2015 Lennart Poettering
diff --git a/man/sd_bus_get_fd.xml b/man/sd_bus_get_fd.xml
index 9f7019069f..2e867b0bf7 100644
--- a/man/sd_bus_get_fd.xml
+++ b/man/sd_bus_get_fd.xml
@@ -3,6 +3,8 @@
 "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2016 Julian Orth
diff --git a/man/sd_bus_message_append.xml b/man/sd_bus_message_append.xml
index 2c28ee7154..3fba212014 100644
--- a/man/sd_bus_message_append.xml
+++ b/man/sd_bus_message_append.xml
@@ -3,6 +3,8 @@
 "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2014 Zbigniew Jędrzejewski-Szmek
diff --git a/man/sd_bus_message_append_array.xml b/man/sd_bus_message_append_array.xml
index 27db2a96c3..2b9f3d1832 100644
--- a/man/sd_bus_message_append_array.xml
+++ b/man/sd_bus_message_append_array.xml
@@ -3,6 +3,8 @@
 "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2014 Zbigniew Jędrzejewski-Szmek
diff --git a/man/sd_bus_message_append_basic.xml b/man/sd_bus_message_append_basic.xml
index 276953af69..bec126836e 100644
--- a/man/sd_bus_message_append_basic.xml
+++ b/man/sd_bus_message_append_basic.xml
@@ -3,6 +3,8 @@
 "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2014 Zbigniew Jędrzejewski-Szmek
diff --git a/man/sd_bus_message_append_string_memfd.xml b/man/sd_bus_message_append_string_memfd.xml
index 9e99999bf3..470c62d4e1 100644
--- a/man/sd_bus_message_append_string_memfd.xml
+++ b/man/sd_bus_message_append_string_memfd.xml
@@ -3,6 +3,8 @@
 "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2014 Zbigniew Jędrzejewski-Szmek
diff --git a/man/sd_bus_message_append_strv.xml b/man/sd_bus_message_append_strv.xml
index 0f77adcc8b..21feafd501 100644
--- a/man/sd_bus_message_append_strv.xml
+++ b/man/sd_bus_message_append_strv.xml
@@ -3,6 +3,8 @@
 "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2014 Zbigniew Jędrzejewski-Szmek
diff --git a/man/sd_bus_message_get_cookie.xml b/man/sd_bus_message_get_cookie.xml
index 3328eead3d..d87d361501 100644
--- a/man/sd_bus_message_get_cookie.xml
+++ b/man/sd_bus_message_get_cookie.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2013 Lennart Poettering
diff --git a/man/sd_bus_message_get_monotonic_usec.xml b/man/sd_bus_message_get_monotonic_usec.xml
index 2c0a8a5d54..9d619e5f68 100644
--- a/man/sd_bus_message_get_monotonic_usec.xml
+++ b/man/sd_bus_message_get_monotonic_usec.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2013 Lennart Poettering
diff --git a/man/sd_bus_message_read_basic.xml b/man/sd_bus_message_read_basic.xml
index 6a46403159..eb1750b2db 100644
--- a/man/sd_bus_message_read_basic.xml
+++ b/man/sd_bus_message_read_basic.xml
@@ -3,6 +3,8 @@
 "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2016 Julian Orth
diff --git a/man/sd_bus_negotiate_fds.xml b/man/sd_bus_negotiate_fds.xml
index e91269ba31..5841c2dad6 100644
--- a/man/sd_bus_negotiate_fds.xml
+++ b/man/sd_bus_negotiate_fds.xml
@@ -3,6 +3,8 @@
 "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2014 Lennart Poettering
diff --git a/man/sd_bus_new.xml b/man/sd_bus_new.xml
index d281b5dd44..57e9f4a9cf 100644
--- a/man/sd_bus_new.xml
+++ b/man/sd_bus_new.xml
@@ -3,6 +3,8 @@
 "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2014 Zbigniew Jędrzejewski-Szmek
diff --git a/man/sd_bus_path_encode.xml b/man/sd_bus_path_encode.xml
index 986eccc6a8..1c898b4fab 100644
--- a/man/sd_bus_path_encode.xml
+++ b/man/sd_bus_path_encode.xml
@@ -3,6 +3,8 @@
 "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2014 Zbigniew Jędrzejewski-Szmek
diff --git a/man/sd_bus_process.xml b/man/sd_bus_process.xml
index 4b9f52e52f..d9731f332c 100644
--- a/man/sd_bus_process.xml
+++ b/man/sd_bus_process.xml
@@ -3,6 +3,8 @@
 "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2016 Julian Orth
diff --git a/man/sd_bus_request_name.xml b/man/sd_bus_request_name.xml
index f07ae09555..f44cfdb1ac 100644
--- a/man/sd_bus_request_name.xml
+++ b/man/sd_bus_request_name.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2013 Lennart Poettering
diff --git a/man/sd_bus_track_add_name.xml b/man/sd_bus_track_add_name.xml
index 6a5e344cb1..19d0115bc9 100644
--- a/man/sd_bus_track_add_name.xml
+++ b/man/sd_bus_track_add_name.xml
@@ -3,6 +3,8 @@
 "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2016 Lennart Poettering
diff --git a/man/sd_bus_track_new.xml b/man/sd_bus_track_new.xml
index 60e2e77f75..4f92a5513d 100644
--- a/man/sd_bus_track_new.xml
+++ b/man/sd_bus_track_new.xml
@@ -3,6 +3,8 @@
 "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2016 Lennart Poettering
diff --git a/man/sd_event_add_child.xml b/man/sd_event_add_child.xml
index bc732db7fa..15ea5de327 100644
--- a/man/sd_event_add_child.xml
+++ b/man/sd_event_add_child.xml
@@ -3,6 +3,8 @@
 "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2014 Zbigniew Jędrzejewski-Szmek
diff --git a/man/sd_event_add_defer.xml b/man/sd_event_add_defer.xml
index ab28b330fe..9064e63365 100644
--- a/man/sd_event_add_defer.xml
+++ b/man/sd_event_add_defer.xml
@@ -3,6 +3,8 @@
 "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2014 Zbigniew Jędrzejewski-Szmek
diff --git a/man/sd_event_add_io.xml b/man/sd_event_add_io.xml
index c3749164cd..d7b26f7887 100644
--- a/man/sd_event_add_io.xml
+++ b/man/sd_event_add_io.xml
@@ -3,6 +3,8 @@
 "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2015 Lennart Poettering
diff --git a/man/sd_event_add_signal.xml b/man/sd_event_add_signal.xml
index e98f1d2682..192ba95ffa 100644
--- a/man/sd_event_add_signal.xml
+++ b/man/sd_event_add_signal.xml
@@ -3,6 +3,8 @@
 "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2014 Zbigniew Jędrzejewski-Szmek
diff --git a/man/sd_event_add_time.xml b/man/sd_event_add_time.xml
index 5496b71529..56abac18cd 100644
--- a/man/sd_event_add_time.xml
+++ b/man/sd_event_add_time.xml
@@ -3,6 +3,8 @@
 "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2014 Lennart Poettering
diff --git a/man/sd_event_exit.xml b/man/sd_event_exit.xml
index 9846a3eaf4..a798a1c482 100644
--- a/man/sd_event_exit.xml
+++ b/man/sd_event_exit.xml
@@ -3,6 +3,8 @@
 "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2015 Lennart Poettering
diff --git a/man/sd_event_get_fd.xml b/man/sd_event_get_fd.xml
index f68752dd0e..ed648c2347 100644
--- a/man/sd_event_get_fd.xml
+++ b/man/sd_event_get_fd.xml
@@ -3,6 +3,8 @@
 "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2014 Zbigniew Jędrzejewski-Szmek
diff --git a/man/sd_event_new.xml b/man/sd_event_new.xml
index c0a5e98177..35f91cd303 100644
--- a/man/sd_event_new.xml
+++ b/man/sd_event_new.xml
@@ -3,6 +3,8 @@
 "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2014 Lennart Poettering
diff --git a/man/sd_event_now.xml b/man/sd_event_now.xml
index 2c83b0bcb5..a17e208934 100644
--- a/man/sd_event_now.xml
+++ b/man/sd_event_now.xml
@@ -3,6 +3,8 @@
 "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2015 Lennart Poettering
diff --git a/man/sd_event_run.xml b/man/sd_event_run.xml
index 5b68959165..fb2687f3a4 100644
--- a/man/sd_event_run.xml
+++ b/man/sd_event_run.xml
@@ -3,6 +3,8 @@
 "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2015 Zbigniew Jędrzejewski-Szmek
diff --git a/man/sd_event_set_watchdog.xml b/man/sd_event_set_watchdog.xml
index cbc5bc0836..ee28caf235 100644
--- a/man/sd_event_set_watchdog.xml
+++ b/man/sd_event_set_watchdog.xml
@@ -3,6 +3,8 @@
 "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2015 Lennart Poettering
diff --git a/man/sd_event_source_get_event.xml b/man/sd_event_source_get_event.xml
index 2fdbd411bd..219956dcee 100644
--- a/man/sd_event_source_get_event.xml
+++ b/man/sd_event_source_get_event.xml
@@ -3,6 +3,8 @@
 "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2015 Lennart Poettering
diff --git a/man/sd_event_source_get_pending.xml b/man/sd_event_source_get_pending.xml
index 7f88bd1b87..dff6952a5a 100644
--- a/man/sd_event_source_get_pending.xml
+++ b/man/sd_event_source_get_pending.xml
@@ -3,6 +3,8 @@
 "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2015 Lennart Poettering
diff --git a/man/sd_event_source_set_description.xml b/man/sd_event_source_set_description.xml
index b9488a622f..ad855e6f89 100644
--- a/man/sd_event_source_set_description.xml
+++ b/man/sd_event_source_set_description.xml
@@ -3,6 +3,8 @@
 "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2014 Zbigniew Jędrzejewski-Szmek
diff --git a/man/sd_event_source_set_enabled.xml b/man/sd_event_source_set_enabled.xml
index 6844f29a49..0628c3e8e9 100644
--- a/man/sd_event_source_set_enabled.xml
+++ b/man/sd_event_source_set_enabled.xml
@@ -3,6 +3,8 @@
 "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2015 Lennart Poettering
diff --git a/man/sd_event_source_set_prepare.xml b/man/sd_event_source_set_prepare.xml
index ee61d23983..148cab16b1 100644
--- a/man/sd_event_source_set_prepare.xml
+++ b/man/sd_event_source_set_prepare.xml
@@ -3,6 +3,8 @@
 "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2015 Lennart Poettering
diff --git a/man/sd_event_source_set_priority.xml b/man/sd_event_source_set_priority.xml
index b6bab6d316..43edd76a7e 100644
--- a/man/sd_event_source_set_priority.xml
+++ b/man/sd_event_source_set_priority.xml
@@ -3,6 +3,8 @@
 "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2015 Lennart Poettering
diff --git a/man/sd_event_source_set_userdata.xml b/man/sd_event_source_set_userdata.xml
index 533d491b13..cb317ad1d7 100644
--- a/man/sd_event_source_set_userdata.xml
+++ b/man/sd_event_source_set_userdata.xml
@@ -3,6 +3,8 @@
 "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2015 Lennart Poettering
diff --git a/man/sd_event_source_unref.xml b/man/sd_event_source_unref.xml
index 2c4d450763..ec9e7c01fc 100644
--- a/man/sd_event_source_unref.xml
+++ b/man/sd_event_source_unref.xml
@@ -3,6 +3,8 @@
 "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2015 Lennart Poettering
diff --git a/man/sd_event_wait.xml b/man/sd_event_wait.xml
index 26327dc688..89de31d22f 100644
--- a/man/sd_event_wait.xml
+++ b/man/sd_event_wait.xml
@@ -3,6 +3,8 @@
 "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2015 Zbigniew Jędrzejewski-Szmek
diff --git a/man/sd_get_seats.xml b/man/sd_get_seats.xml
index c053144483..b4b133ff0f 100644
--- a/man/sd_get_seats.xml
+++ b/man/sd_get_seats.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2010 Lennart Poettering
diff --git a/man/sd_id128_get_machine.xml b/man/sd_id128_get_machine.xml
index 3938c6d836..a97beebbd5 100644
--- a/man/sd_id128_get_machine.xml
+++ b/man/sd_id128_get_machine.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2012 Lennart Poettering
diff --git a/man/sd_id128_randomize.xml b/man/sd_id128_randomize.xml
index 852a9fd7eb..bdce3b18b7 100644
--- a/man/sd_id128_randomize.xml
+++ b/man/sd_id128_randomize.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2012 Lennart Poettering
diff --git a/man/sd_id128_to_string.xml b/man/sd_id128_to_string.xml
index 927d1ad5f2..b82b141a3a 100644
--- a/man/sd_id128_to_string.xml
+++ b/man/sd_id128_to_string.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2012 Lennart Poettering
diff --git a/man/sd_is_fifo.xml b/man/sd_is_fifo.xml
index 3bd388d80e..2af17df650 100644
--- a/man/sd_is_fifo.xml
+++ b/man/sd_is_fifo.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2010 Lennart Poettering
diff --git a/man/sd_journal_add_match.xml b/man/sd_journal_add_match.xml
index 2294b43643..b41d6189d9 100644
--- a/man/sd_journal_add_match.xml
+++ b/man/sd_journal_add_match.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2012 Lennart Poettering
diff --git a/man/sd_journal_enumerate_fields.xml b/man/sd_journal_enumerate_fields.xml
index bc2c21ed4b..20005564b0 100644
--- a/man/sd_journal_enumerate_fields.xml
+++ b/man/sd_journal_enumerate_fields.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2016 Lennart Poettering
diff --git a/man/sd_journal_get_catalog.xml b/man/sd_journal_get_catalog.xml
index 92ed0dea06..95f3e3b007 100644
--- a/man/sd_journal_get_catalog.xml
+++ b/man/sd_journal_get_catalog.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2012 Lennart Poettering
diff --git a/man/sd_journal_get_cursor.xml b/man/sd_journal_get_cursor.xml
index b7aa05f8b2..ead150ec53 100644
--- a/man/sd_journal_get_cursor.xml
+++ b/man/sd_journal_get_cursor.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2012 Lennart Poettering
diff --git a/man/sd_journal_get_cutoff_realtime_usec.xml b/man/sd_journal_get_cutoff_realtime_usec.xml
index 0950e11b44..8fd9674111 100644
--- a/man/sd_journal_get_cutoff_realtime_usec.xml
+++ b/man/sd_journal_get_cutoff_realtime_usec.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2012 Lennart Poettering
diff --git a/man/sd_journal_get_data.xml b/man/sd_journal_get_data.xml
index 01e436e70d..831ed0bc6e 100644
--- a/man/sd_journal_get_data.xml
+++ b/man/sd_journal_get_data.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2012 Lennart Poettering
diff --git a/man/sd_journal_get_fd.xml b/man/sd_journal_get_fd.xml
index 2e686caccb..b162b2bf11 100644
--- a/man/sd_journal_get_fd.xml
+++ b/man/sd_journal_get_fd.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2012 Lennart Poettering
diff --git a/man/sd_journal_get_realtime_usec.xml b/man/sd_journal_get_realtime_usec.xml
index 607d74666b..49800c34a3 100644
--- a/man/sd_journal_get_realtime_usec.xml
+++ b/man/sd_journal_get_realtime_usec.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2012 Lennart Poettering
diff --git a/man/sd_journal_get_usage.xml b/man/sd_journal_get_usage.xml
index 06b0ff534d..63d073e119 100644
--- a/man/sd_journal_get_usage.xml
+++ b/man/sd_journal_get_usage.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2012 Lennart Poettering
diff --git a/man/sd_journal_has_runtime_files.xml b/man/sd_journal_has_runtime_files.xml
index 3f6d56ca77..7431190496 100644
--- a/man/sd_journal_has_runtime_files.xml
+++ b/man/sd_journal_has_runtime_files.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2016 Jan Synáček
diff --git a/man/sd_journal_next.xml b/man/sd_journal_next.xml
index 7c385de260..18b0da048d 100644
--- a/man/sd_journal_next.xml
+++ b/man/sd_journal_next.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2012 Lennart Poettering
diff --git a/man/sd_journal_open.xml b/man/sd_journal_open.xml
index 25b3048f2e..5e7ae45688 100644
--- a/man/sd_journal_open.xml
+++ b/man/sd_journal_open.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2012 Lennart Poettering
diff --git a/man/sd_journal_print.xml b/man/sd_journal_print.xml
index a741abe32d..f771ba307f 100644
--- a/man/sd_journal_print.xml
+++ b/man/sd_journal_print.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2012 Lennart Poettering
diff --git a/man/sd_journal_query_unique.xml b/man/sd_journal_query_unique.xml
index d7a41a039c..fb08400f20 100644
--- a/man/sd_journal_query_unique.xml
+++ b/man/sd_journal_query_unique.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2012 Lennart Poettering
diff --git a/man/sd_journal_seek_head.xml b/man/sd_journal_seek_head.xml
index 985073496c..7e866e8e82 100644
--- a/man/sd_journal_seek_head.xml
+++ b/man/sd_journal_seek_head.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2012 Lennart Poettering
diff --git a/man/sd_journal_stream_fd.xml b/man/sd_journal_stream_fd.xml
index db88eba1bc..29d64f91d7 100644
--- a/man/sd_journal_stream_fd.xml
+++ b/man/sd_journal_stream_fd.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2012 Lennart Poettering
diff --git a/man/sd_listen_fds.xml b/man/sd_listen_fds.xml
index c1c2423884..8563a06997 100644
--- a/man/sd_listen_fds.xml
+++ b/man/sd_listen_fds.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2010 Lennart Poettering
diff --git a/man/sd_login_monitor_new.xml b/man/sd_login_monitor_new.xml
index 129c99f97d..935fca5697 100644
--- a/man/sd_login_monitor_new.xml
+++ b/man/sd_login_monitor_new.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2010 Lennart Poettering
diff --git a/man/sd_machine_get_class.xml b/man/sd_machine_get_class.xml
index ef604139da..989fa2db0f 100644
--- a/man/sd_machine_get_class.xml
+++ b/man/sd_machine_get_class.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2014 Lennart Poettering
diff --git a/man/sd_notify.xml b/man/sd_notify.xml
index 7d7b0077be..078f1ff7e0 100644
--- a/man/sd_notify.xml
+++ b/man/sd_notify.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2010 Lennart Poettering
diff --git a/man/sd_pid_get_owner_uid.xml b/man/sd_pid_get_owner_uid.xml
index 5a2a07d096..fcedcfcd1f 100644
--- a/man/sd_pid_get_owner_uid.xml
+++ b/man/sd_pid_get_owner_uid.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2010 Lennart Poettering
diff --git a/man/sd_seat_get_active.xml b/man/sd_seat_get_active.xml
index 3dd461f83f..57a6b526f2 100644
--- a/man/sd_seat_get_active.xml
+++ b/man/sd_seat_get_active.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2010 Lennart Poettering
diff --git a/man/sd_session_is_active.xml b/man/sd_session_is_active.xml
index f95e74ead6..14993bcd67 100644
--- a/man/sd_session_is_active.xml
+++ b/man/sd_session_is_active.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2010 Lennart Poettering
diff --git a/man/sd_uid_get_state.xml b/man/sd_uid_get_state.xml
index 130af761da..1183d9079a 100644
--- a/man/sd_uid_get_state.xml
+++ b/man/sd_uid_get_state.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2010 Lennart Poettering
diff --git a/man/sd_watchdog_enabled.xml b/man/sd_watchdog_enabled.xml
index 759d9303c6..e85998c216 100644
--- a/man/sd_watchdog_enabled.xml
+++ b/man/sd_watchdog_enabled.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2013 Lennart Poettering
diff --git a/man/shutdown.xml b/man/shutdown.xml
index a8af387c67..41fe71f4da 100644
--- a/man/shutdown.xml
+++ b/man/shutdown.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2010 Lennart Poettering
diff --git a/man/sysctl.d.xml b/man/sysctl.d.xml
index ccf6c8e39f..ec69b4c5bb 100644
--- a/man/sysctl.d.xml
+++ b/man/sysctl.d.xml
@@ -1,6 +1,8 @@
 <?xml version="1.0"?> <!--*-nxml-*-->
 <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2011 Lennart Poettering
diff --git a/man/systemctl.xml b/man/systemctl.xml
index f5df6065fa..c13253c266 100644
--- a/man/systemctl.xml
+++ b/man/systemctl.xml
@@ -6,6 +6,8 @@
 ]>
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2010 Lennart Poettering
diff --git a/man/systemd-analyze.xml b/man/systemd-analyze.xml
index e74739498c..956790c50c 100644
--- a/man/systemd-analyze.xml
+++ b/man/systemd-analyze.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2012 Lennart Poettering
diff --git a/man/systemd-ask-password-console.service.xml b/man/systemd-ask-password-console.service.xml
index 3c1537d942..db318de8c2 100644
--- a/man/systemd-ask-password-console.service.xml
+++ b/man/systemd-ask-password-console.service.xml
@@ -2,6 +2,8 @@
 <!--*-nxml-*-->
 <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2012 Lennart Poettering
diff --git a/man/systemd-ask-password.xml b/man/systemd-ask-password.xml
index 16ec257014..686fa89468 100644
--- a/man/systemd-ask-password.xml
+++ b/man/systemd-ask-password.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2011 Lennart Poettering
diff --git a/man/systemd-backlight@.service.xml b/man/systemd-backlight@.service.xml
index 3459ed8851..e047884c50 100644
--- a/man/systemd-backlight@.service.xml
+++ b/man/systemd-backlight@.service.xml
@@ -2,6 +2,8 @@
 <!--*-nxml-*-->
 <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2013 Lennart Poettering
diff --git a/man/systemd-binfmt.service.xml b/man/systemd-binfmt.service.xml
index cccfb49ca9..0c33348ba8 100644
--- a/man/systemd-binfmt.service.xml
+++ b/man/systemd-binfmt.service.xml
@@ -2,6 +2,8 @@
 <!--*-nxml-*-->
 <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2012 Lennart Poettering
diff --git a/man/systemd-cat.xml b/man/systemd-cat.xml
index 160db9fb5c..2c394f2ceb 100644
--- a/man/systemd-cat.xml
+++ b/man/systemd-cat.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2012 Lennart Poettering
diff --git a/man/systemd-cgls.xml b/man/systemd-cgls.xml
index 219514b183..128324e616 100644
--- a/man/systemd-cgls.xml
+++ b/man/systemd-cgls.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2010 Lennart Poettering
diff --git a/man/systemd-cgtop.xml b/man/systemd-cgtop.xml
index be13631239..d7ad08ec37 100644
--- a/man/systemd-cgtop.xml
+++ b/man/systemd-cgtop.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2012 Lennart Poettering
diff --git a/man/systemd-coredump.xml b/man/systemd-coredump.xml
index d71fdc644f..1341866463 100644
--- a/man/systemd-coredump.xml
+++ b/man/systemd-coredump.xml
@@ -3,6 +3,8 @@
         "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2014 Zbigniew Jędrzejewski-Szmek
diff --git a/man/systemd-cryptsetup-generator.xml b/man/systemd-cryptsetup-generator.xml
index f036ab9744..645e2ee178 100644
--- a/man/systemd-cryptsetup-generator.xml
+++ b/man/systemd-cryptsetup-generator.xml
@@ -2,6 +2,8 @@
 <!--*-nxml-*-->
 <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2012 Lennart Poettering
diff --git a/man/systemd-cryptsetup@.service.xml b/man/systemd-cryptsetup@.service.xml
index 73bd5b78ab..efcbf247f4 100644
--- a/man/systemd-cryptsetup@.service.xml
+++ b/man/systemd-cryptsetup@.service.xml
@@ -2,6 +2,8 @@
 <!--*-nxml-*-->
 <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2012 Lennart Poettering
diff --git a/man/systemd-debug-generator.xml b/man/systemd-debug-generator.xml
index 0a66b9bbf9..e8656a36ab 100644
--- a/man/systemd-debug-generator.xml
+++ b/man/systemd-debug-generator.xml
@@ -2,6 +2,8 @@
 <!--*-nxml-*-->
 <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2014 Lennart Poettering
diff --git a/man/systemd-delta.xml b/man/systemd-delta.xml
index be241f6950..94f6b093db 100644
--- a/man/systemd-delta.xml
+++ b/man/systemd-delta.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2012 Lennart Poettering
diff --git a/man/systemd-detect-virt.xml b/man/systemd-detect-virt.xml
index 72ea35892f..4426827e57 100644
--- a/man/systemd-detect-virt.xml
+++ b/man/systemd-detect-virt.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2010 Lennart Poettering
diff --git a/man/systemd-environment-d-generator.xml b/man/systemd-environment-d-generator.xml
index 7950aa98a5..7bc1dd0ef1 100644
--- a/man/systemd-environment-d-generator.xml
+++ b/man/systemd-environment-d-generator.xml
@@ -6,6 +6,8 @@
 ]>
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2017 Zbigniew Jędrzejewski-Szmek
diff --git a/man/systemd-escape.xml b/man/systemd-escape.xml
index a2f2b9242f..513e9a6a97 100644
--- a/man/systemd-escape.xml
+++ b/man/systemd-escape.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2014 Lennart Poettering
diff --git a/man/systemd-firstboot.xml b/man/systemd-firstboot.xml
index fee37ad19c..0ac5f3bd85 100644
--- a/man/systemd-firstboot.xml
+++ b/man/systemd-firstboot.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2014 Lennart Poettering
diff --git a/man/systemd-fsck@.service.xml b/man/systemd-fsck@.service.xml
index 711e269016..f4d2dc1341 100644
--- a/man/systemd-fsck@.service.xml
+++ b/man/systemd-fsck@.service.xml
@@ -2,6 +2,8 @@
 <!--*-nxml-*-->
 <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2012 Lennart Poettering
diff --git a/man/systemd-fstab-generator.xml b/man/systemd-fstab-generator.xml
index b898d719f2..51e390a364 100644
--- a/man/systemd-fstab-generator.xml
+++ b/man/systemd-fstab-generator.xml
@@ -2,6 +2,8 @@
 <!--*-nxml-*-->
 <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2012 Lennart Poettering
diff --git a/man/systemd-getty-generator.xml b/man/systemd-getty-generator.xml
index 3058444467..adb48a7fd6 100644
--- a/man/systemd-getty-generator.xml
+++ b/man/systemd-getty-generator.xml
@@ -2,6 +2,8 @@
 <!--*-nxml-*-->
 <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2012 Lennart Poettering
diff --git a/man/systemd-gpt-auto-generator.xml b/man/systemd-gpt-auto-generator.xml
index 2927fcd291..3fbe215c41 100644
--- a/man/systemd-gpt-auto-generator.xml
+++ b/man/systemd-gpt-auto-generator.xml
@@ -2,6 +2,8 @@
 <!--*-nxml-*-->
 <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2013 Lennart Poettering
diff --git a/man/systemd-halt.service.xml b/man/systemd-halt.service.xml
index d16e5d628f..b58279d828 100644
--- a/man/systemd-halt.service.xml
+++ b/man/systemd-halt.service.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2012 Lennart Poettering
diff --git a/man/systemd-hibernate-resume-generator.xml b/man/systemd-hibernate-resume-generator.xml
index 3bbb6ab989..188bdb6e57 100644
--- a/man/systemd-hibernate-resume-generator.xml
+++ b/man/systemd-hibernate-resume-generator.xml
@@ -2,6 +2,8 @@
 <!--*-nxml-*-->
 <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2014 Ivan Shapovalov
diff --git a/man/systemd-hibernate-resume@.service.xml b/man/systemd-hibernate-resume@.service.xml
index a968adf0a9..cbda08961c 100644
--- a/man/systemd-hibernate-resume@.service.xml
+++ b/man/systemd-hibernate-resume@.service.xml
@@ -2,6 +2,8 @@
 <!--*-nxml-*-->
 <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2014 Ivan Shapovalov
diff --git a/man/systemd-hostnamed.service.xml b/man/systemd-hostnamed.service.xml
index 17755aa69e..e905e461be 100644
--- a/man/systemd-hostnamed.service.xml
+++ b/man/systemd-hostnamed.service.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2012 Lennart Poettering
diff --git a/man/systemd-importd.service.xml b/man/systemd-importd.service.xml
index 70a618ce46..9fd36bb3b3 100644
--- a/man/systemd-importd.service.xml
+++ b/man/systemd-importd.service.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2016 Lennart Poettering
diff --git a/man/systemd-inhibit.xml b/man/systemd-inhibit.xml
index 09b82b82c1..ce34cc8c50 100644
--- a/man/systemd-inhibit.xml
+++ b/man/systemd-inhibit.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2012 Lennart Poettering
diff --git a/man/systemd-initctl.service.xml b/man/systemd-initctl.service.xml
index 5c7f9a4a16..64211e27f7 100644
--- a/man/systemd-initctl.service.xml
+++ b/man/systemd-initctl.service.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2012 Lennart Poettering
diff --git a/man/systemd-journal-gatewayd.service.xml b/man/systemd-journal-gatewayd.service.xml
index 3ee344e50b..b82cc979e7 100644
--- a/man/systemd-journal-gatewayd.service.xml
+++ b/man/systemd-journal-gatewayd.service.xml
@@ -3,6 +3,8 @@
 "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2012 Zbigniew Jędrzejewski-Szmek
diff --git a/man/systemd-journal-remote.xml b/man/systemd-journal-remote.xml
index 1f1c305267..ba88df535b 100644
--- a/man/systemd-journal-remote.xml
+++ b/man/systemd-journal-remote.xml
@@ -3,6 +3,8 @@
 "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2012 Zbigniew Jędrzejewski-Szmek
diff --git a/man/systemd-journal-upload.xml b/man/systemd-journal-upload.xml
index f9723dea89..6fc477d75a 100644
--- a/man/systemd-journal-upload.xml
+++ b/man/systemd-journal-upload.xml
@@ -3,6 +3,8 @@
 "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2014 Zbigniew Jędrzejewski-Szmek
diff --git a/man/systemd-journald.service.xml b/man/systemd-journald.service.xml
index 7b33d3ff17..8ca0e896ab 100644
--- a/man/systemd-journald.service.xml
+++ b/man/systemd-journald.service.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2010 Lennart Poettering
diff --git a/man/systemd-localed.service.xml b/man/systemd-localed.service.xml
index 2a796c9045..308a848c08 100644
--- a/man/systemd-localed.service.xml
+++ b/man/systemd-localed.service.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2012 Lennart Poettering
diff --git a/man/systemd-logind.service.xml b/man/systemd-logind.service.xml
index 47089fd8c7..b51158b7cd 100644
--- a/man/systemd-logind.service.xml
+++ b/man/systemd-logind.service.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2010 Lennart Poettering
diff --git a/man/systemd-machine-id-commit.service.xml b/man/systemd-machine-id-commit.service.xml
index 39da1922cc..acb4ffb626 100644
--- a/man/systemd-machine-id-commit.service.xml
+++ b/man/systemd-machine-id-commit.service.xml
@@ -2,6 +2,8 @@
 <!--*-nxml-*-->
 <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2014 Didier Roche
diff --git a/man/systemd-machine-id-setup.xml b/man/systemd-machine-id-setup.xml
index 714317c945..527cb7bff5 100644
--- a/man/systemd-machine-id-setup.xml
+++ b/man/systemd-machine-id-setup.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2012 Lennart Poettering
diff --git a/man/systemd-machined.service.xml b/man/systemd-machined.service.xml
index c4f173f79b..8bf4e75550 100644
--- a/man/systemd-machined.service.xml
+++ b/man/systemd-machined.service.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2013 Zbigniew Jędrzejewski-Szmek
diff --git a/man/systemd-modules-load.service.xml b/man/systemd-modules-load.service.xml
index ee097d7f5c..6f370190f2 100644
--- a/man/systemd-modules-load.service.xml
+++ b/man/systemd-modules-load.service.xml
@@ -2,6 +2,8 @@
 <!--*-nxml-*-->
 <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2012 Lennart Poettering
diff --git a/man/systemd-mount.xml b/man/systemd-mount.xml
index a27326d246..87bc2b36eb 100644
--- a/man/systemd-mount.xml
+++ b/man/systemd-mount.xml
@@ -3,6 +3,8 @@
 "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2016 Lennart Poettering
diff --git a/man/systemd-networkd-wait-online.service.xml b/man/systemd-networkd-wait-online.service.xml
index e21c805342..96715cad2f 100644
--- a/man/systemd-networkd-wait-online.service.xml
+++ b/man/systemd-networkd-wait-online.service.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2014 Tom Gundersen
diff --git a/man/systemd-networkd.service.xml b/man/systemd-networkd.service.xml
index a6e079c887..8bc5f5e869 100644
--- a/man/systemd-networkd.service.xml
+++ b/man/systemd-networkd.service.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2013 Tom Gundersen
diff --git a/man/systemd-notify.xml b/man/systemd-notify.xml
index 8c56a6b8ed..acd4ee41fc 100644
--- a/man/systemd-notify.xml
+++ b/man/systemd-notify.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2010 Lennart Poettering
diff --git a/man/systemd-nspawn.xml b/man/systemd-nspawn.xml
index 1ef6567e48..cd45ceb2a1 100644
--- a/man/systemd-nspawn.xml
+++ b/man/systemd-nspawn.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2010 Lennart Poettering
diff --git a/man/systemd-path.xml b/man/systemd-path.xml
index e2b23eec51..7144569d59 100644
--- a/man/systemd-path.xml
+++ b/man/systemd-path.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2014 Lennart Poettering
diff --git a/man/systemd-quotacheck.service.xml b/man/systemd-quotacheck.service.xml
index 9d4976274e..c3a5e69d40 100644
--- a/man/systemd-quotacheck.service.xml
+++ b/man/systemd-quotacheck.service.xml
@@ -2,6 +2,8 @@
 <!--*-nxml-*-->
 <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2012 Lennart Poettering
diff --git a/man/systemd-random-seed.service.xml b/man/systemd-random-seed.service.xml
index 9ec01b6c34..658bdf3638 100644
--- a/man/systemd-random-seed.service.xml
+++ b/man/systemd-random-seed.service.xml
@@ -2,6 +2,8 @@
 <!--*-nxml-*-->
 <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2012 Lennart Poettering
diff --git a/man/systemd-remount-fs.service.xml b/man/systemd-remount-fs.service.xml
index 6a5f0e6e38..8e68b99fe5 100644
--- a/man/systemd-remount-fs.service.xml
+++ b/man/systemd-remount-fs.service.xml
@@ -2,6 +2,8 @@
 <!--*-nxml-*-->
 <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2012 Lennart Poettering
diff --git a/man/systemd-resolve.xml b/man/systemd-resolve.xml
index 53f843ff93..835521aa74 100644
--- a/man/systemd-resolve.xml
+++ b/man/systemd-resolve.xml
@@ -3,6 +3,8 @@
 "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2016 Lennart Poettering
diff --git a/man/systemd-resolved.service.xml b/man/systemd-resolved.service.xml
index 2f947086f5..da6e8c4441 100644
--- a/man/systemd-resolved.service.xml
+++ b/man/systemd-resolved.service.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2014 Tom Gundersen
diff --git a/man/systemd-rfkill.service.xml b/man/systemd-rfkill.service.xml
index f464842700..cb6fae4c2d 100644
--- a/man/systemd-rfkill.service.xml
+++ b/man/systemd-rfkill.service.xml
@@ -2,6 +2,8 @@
 <!--*-nxml-*-->
 <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2013 Lennart Poettering
diff --git a/man/systemd-run.xml b/man/systemd-run.xml
index 010c9c7197..9db6a26dfd 100644
--- a/man/systemd-run.xml
+++ b/man/systemd-run.xml
@@ -3,6 +3,8 @@
 "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2013 Zbigniew Jędrzejewski-Szmek
diff --git a/man/systemd-sleep.conf.xml b/man/systemd-sleep.conf.xml
index 9a379ecb94..7fecd667de 100644
--- a/man/systemd-sleep.conf.xml
+++ b/man/systemd-sleep.conf.xml
@@ -3,6 +3,8 @@
 "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2013 Zbigniew Jędrzejewski-Szmek
diff --git a/man/systemd-socket-activate.xml b/man/systemd-socket-activate.xml
index 356bc10359..79e35dd30e 100644
--- a/man/systemd-socket-activate.xml
+++ b/man/systemd-socket-activate.xml
@@ -3,6 +3,8 @@
 "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2013 Zbigniew Jędrzejewski-Szmek
diff --git a/man/systemd-socket-proxyd.xml b/man/systemd-socket-proxyd.xml
index 737f05ee93..1705374826 100644
--- a/man/systemd-socket-proxyd.xml
+++ b/man/systemd-socket-proxyd.xml
@@ -3,6 +3,8 @@
 <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
      "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2013 David Strauss
diff --git a/man/systemd-suspend.service.xml b/man/systemd-suspend.service.xml
index 2aa172e990..24c213eb74 100644
--- a/man/systemd-suspend.service.xml
+++ b/man/systemd-suspend.service.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2012 Lennart Poettering
diff --git a/man/systemd-sysctl.service.xml b/man/systemd-sysctl.service.xml
index ee00e8d262..3251bc6321 100644
--- a/man/systemd-sysctl.service.xml
+++ b/man/systemd-sysctl.service.xml
@@ -2,6 +2,8 @@
 <!--*-nxml-*-->
 <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2012 Lennart Poettering
diff --git a/man/systemd-system-update-generator.xml b/man/systemd-system-update-generator.xml
index 833ed79646..c57dc781db 100644
--- a/man/systemd-system-update-generator.xml
+++ b/man/systemd-system-update-generator.xml
@@ -2,6 +2,8 @@
 <!--*-nxml-*-->
 <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2012 Lennart Poettering
diff --git a/man/systemd-system.conf.xml b/man/systemd-system.conf.xml
index 81f1b1ef8d..43715813ed 100644
--- a/man/systemd-system.conf.xml
+++ b/man/systemd-system.conf.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2010 Lennart Poettering
diff --git a/man/systemd-sysusers.xml b/man/systemd-sysusers.xml
index 990b935cf2..73ba4e4a84 100644
--- a/man/systemd-sysusers.xml
+++ b/man/systemd-sysusers.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2014 Lennart Poettering
diff --git a/man/systemd-sysv-generator.xml b/man/systemd-sysv-generator.xml
index 2353eb3efe..3eceb51381 100644
--- a/man/systemd-sysv-generator.xml
+++ b/man/systemd-sysv-generator.xml
@@ -2,6 +2,8 @@
 <!--*-nxml-*-->
 <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2014 Zbigniew Jędrzejewski-Szmek
diff --git a/man/systemd-timedated.service.xml b/man/systemd-timedated.service.xml
index fee860204d..2dfde3c1b8 100644
--- a/man/systemd-timedated.service.xml
+++ b/man/systemd-timedated.service.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2010 Lennart Poettering
diff --git a/man/systemd-timesyncd.service.xml b/man/systemd-timesyncd.service.xml
index 7860c0d4e4..e9b5c25780 100644
--- a/man/systemd-timesyncd.service.xml
+++ b/man/systemd-timesyncd.service.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2014 Kay Sievers
diff --git a/man/systemd-tmpfiles.xml b/man/systemd-tmpfiles.xml
index 2b8927cb1e..4dd5b3da6c 100644
--- a/man/systemd-tmpfiles.xml
+++ b/man/systemd-tmpfiles.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2010 Lennart Poettering
diff --git a/man/systemd-tty-ask-password-agent.xml b/man/systemd-tty-ask-password-agent.xml
index 2c114f4631..e934649ed9 100644
--- a/man/systemd-tty-ask-password-agent.xml
+++ b/man/systemd-tty-ask-password-agent.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2010 Lennart Poettering
diff --git a/man/systemd-update-done.service.xml b/man/systemd-update-done.service.xml
index a2dad39f01..b0dd56fdff 100644
--- a/man/systemd-update-done.service.xml
+++ b/man/systemd-update-done.service.xml
@@ -2,6 +2,8 @@
 <!--*-nxml-*-->
 <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2014 Lennart Poettering
diff --git a/man/systemd-update-utmp.service.xml b/man/systemd-update-utmp.service.xml
index be7cec236c..286c18ed4c 100644
--- a/man/systemd-update-utmp.service.xml
+++ b/man/systemd-update-utmp.service.xml
@@ -2,6 +2,8 @@
 <!--*-nxml-*-->
 <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2012 Lennart Poettering
diff --git a/man/systemd-user-sessions.service.xml b/man/systemd-user-sessions.service.xml
index 67aba54119..c3eaffa242 100644
--- a/man/systemd-user-sessions.service.xml
+++ b/man/systemd-user-sessions.service.xml
@@ -2,6 +2,8 @@
 <!--*-nxml-*-->
 <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2012 Lennart Poettering
diff --git a/man/systemd-vconsole-setup.service.xml b/man/systemd-vconsole-setup.service.xml
index b8eafcc02e..3b72234b0f 100644
--- a/man/systemd-vconsole-setup.service.xml
+++ b/man/systemd-vconsole-setup.service.xml
@@ -2,6 +2,8 @@
 <!--*-nxml-*-->
 <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2012 Lennart Poettering
diff --git a/man/systemd-veritysetup-generator.xml b/man/systemd-veritysetup-generator.xml
index 87d66e9ee5..b6b5b3bc51 100644
--- a/man/systemd-veritysetup-generator.xml
+++ b/man/systemd-veritysetup-generator.xml
@@ -2,6 +2,8 @@
 <!--*-nxml-*-->
 <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2016 Lennart Poettering
diff --git a/man/systemd-veritysetup@.service.xml b/man/systemd-veritysetup@.service.xml
index 173e5358e0..55600e9ad5 100644
--- a/man/systemd-veritysetup@.service.xml
+++ b/man/systemd-veritysetup@.service.xml
@@ -2,6 +2,8 @@
 <!--*-nxml-*-->
 <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2016 Lennart Poettering
diff --git a/man/systemd-volatile-root.service.xml b/man/systemd-volatile-root.service.xml
index b90a3261fa..ee7c8b3762 100644
--- a/man/systemd-volatile-root.service.xml
+++ b/man/systemd-volatile-root.service.xml
@@ -2,6 +2,8 @@
 <!--*-nxml-*-->
 <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2016 Lennart Poettering
diff --git a/man/systemd.automount.xml b/man/systemd.automount.xml
index 49ea7e510c..b0f5b19372 100644
--- a/man/systemd.automount.xml
+++ b/man/systemd.automount.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2010 Lennart Poettering
diff --git a/man/systemd.device.xml b/man/systemd.device.xml
index e121e151bc..a275a880e4 100644
--- a/man/systemd.device.xml
+++ b/man/systemd.device.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2010 Lennart Poettering
diff --git a/man/systemd.environment-generator.xml b/man/systemd.environment-generator.xml
index ff8be92833..7d3551e3f6 100644
--- a/man/systemd.environment-generator.xml
+++ b/man/systemd.environment-generator.xml
@@ -6,6 +6,8 @@
 ]>
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2017 Zbigniew Jędrzejewski-Szmek
diff --git a/man/systemd.exec.xml b/man/systemd.exec.xml
index 0aa0552f06..af86379bfe 100644
--- a/man/systemd.exec.xml
+++ b/man/systemd.exec.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2010 Lennart Poettering
diff --git a/man/systemd.generator.xml b/man/systemd.generator.xml
index 1624e52c4d..5227bc0976 100644
--- a/man/systemd.generator.xml
+++ b/man/systemd.generator.xml
@@ -6,6 +6,8 @@
 ]>
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2015 Zbigniew Jędrzejewski-Szmek
diff --git a/man/systemd.journal-fields.xml b/man/systemd.journal-fields.xml
index cab356c5e7..b08ef1777e 100644
--- a/man/systemd.journal-fields.xml
+++ b/man/systemd.journal-fields.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2010 Lennart Poettering
diff --git a/man/systemd.kill.xml b/man/systemd.kill.xml
index 13b7ab14df..1abcd6d8e7 100644
--- a/man/systemd.kill.xml
+++ b/man/systemd.kill.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2012 Lennart Poettering
diff --git a/man/systemd.link.xml b/man/systemd.link.xml
index 99bb6a19fb..162674f769 100644
--- a/man/systemd.link.xml
+++ b/man/systemd.link.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2014 Tom Gundersen
diff --git a/man/systemd.mount.xml b/man/systemd.mount.xml
index 94d657499e..bfe52cda0f 100644
--- a/man/systemd.mount.xml
+++ b/man/systemd.mount.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2010 Lennart Poettering
diff --git a/man/systemd.netdev.xml b/man/systemd.netdev.xml
index 6f8991b81c..32048054bc 100644
--- a/man/systemd.netdev.xml
+++ b/man/systemd.netdev.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2013 Tom Gundersen
diff --git a/man/systemd.network.xml b/man/systemd.network.xml
index 2fb5886b79..43324b8898 100644
--- a/man/systemd.network.xml
+++ b/man/systemd.network.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2013 Tom Gundersen
diff --git a/man/systemd.nspawn.xml b/man/systemd.nspawn.xml
index 8a59fc78ff..9a6a2351f8 100644
--- a/man/systemd.nspawn.xml
+++ b/man/systemd.nspawn.xml
@@ -6,6 +6,8 @@
 ]>
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2015 Lennart Poettering
diff --git a/man/systemd.offline-updates.xml b/man/systemd.offline-updates.xml
index 208003bb52..01dd6c55e4 100644
--- a/man/systemd.offline-updates.xml
+++ b/man/systemd.offline-updates.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2013 Lennart Poettering
diff --git a/man/systemd.path.xml b/man/systemd.path.xml
index 9e8f2c66c1..30f295d2d7 100644
--- a/man/systemd.path.xml
+++ b/man/systemd.path.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2010 Lennart Poettering
diff --git a/man/systemd.preset.xml b/man/systemd.preset.xml
index 92eb4e8280..482856221c 100644
--- a/man/systemd.preset.xml
+++ b/man/systemd.preset.xml
@@ -2,6 +2,8 @@
 <!--*-nxml-*-->
 <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2011 Lennart Poettering
diff --git a/man/systemd.resource-control.xml b/man/systemd.resource-control.xml
index 72130672cb..1ab13ea00b 100644
--- a/man/systemd.resource-control.xml
+++ b/man/systemd.resource-control.xml
@@ -3,6 +3,8 @@
 "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2013 Zbigniew Jędrzejewski-Szmek
diff --git a/man/systemd.scope.xml b/man/systemd.scope.xml
index e41493cdd3..092361c6b0 100644
--- a/man/systemd.scope.xml
+++ b/man/systemd.scope.xml
@@ -3,6 +3,8 @@
 "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2013 Zbigniew Jędrzejewski-Szmek
diff --git a/man/systemd.service.xml b/man/systemd.service.xml
index 43c6435dcb..fe83581b6e 100644
--- a/man/systemd.service.xml
+++ b/man/systemd.service.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2010 Lennart Poettering
diff --git a/man/systemd.slice.xml b/man/systemd.slice.xml
index 6906321e81..d67cce102a 100644
--- a/man/systemd.slice.xml
+++ b/man/systemd.slice.xml
@@ -3,6 +3,8 @@
 "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2013 Zbigniew Jędrzejewski-Szmek
diff --git a/man/systemd.socket.xml b/man/systemd.socket.xml
index 68d01cccc5..a1943f65ab 100644
--- a/man/systemd.socket.xml
+++ b/man/systemd.socket.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2010 Lennart Poettering
diff --git a/man/systemd.special.xml b/man/systemd.special.xml
index b6522c5060..0033332d6d 100644
--- a/man/systemd.special.xml
+++ b/man/systemd.special.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2010 Lennart Poettering
diff --git a/man/systemd.swap.xml b/man/systemd.swap.xml
index 254389e774..707b04b208 100644
--- a/man/systemd.swap.xml
+++ b/man/systemd.swap.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2010 Lennart Poettering
diff --git a/man/systemd.target.xml b/man/systemd.target.xml
index bc7f846c88..4daa9f52fd 100644
--- a/man/systemd.target.xml
+++ b/man/systemd.target.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2010 Lennart Poettering
diff --git a/man/systemd.time.xml b/man/systemd.time.xml
index a4f6a785d5..a2fff2d101 100644
--- a/man/systemd.time.xml
+++ b/man/systemd.time.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2010 Lennart Poettering
diff --git a/man/systemd.timer.xml b/man/systemd.timer.xml
index b8f921f3af..5b1bc8b521 100644
--- a/man/systemd.timer.xml
+++ b/man/systemd.timer.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2010 Lennart Poettering
diff --git a/man/systemd.unit.xml b/man/systemd.unit.xml
index 4f39505aed..18ad2b5f59 100644
--- a/man/systemd.unit.xml
+++ b/man/systemd.unit.xml
@@ -6,6 +6,8 @@
 ]>
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2010 Lennart Poettering
diff --git a/man/systemd.xml b/man/systemd.xml
index b455b605cb..70b456861d 100644
--- a/man/systemd.xml
+++ b/man/systemd.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2010 Lennart Poettering
diff --git a/man/sysusers.d.xml b/man/sysusers.d.xml
index fbe97544d7..38b749cf15 100644
--- a/man/sysusers.d.xml
+++ b/man/sysusers.d.xml
@@ -2,6 +2,8 @@
 <!--*-nxml-*-->
 <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2014 Lennart Poettering
diff --git a/man/telinit.xml b/man/telinit.xml
index bdd22a6ce8..70044cc1da 100644
--- a/man/telinit.xml
+++ b/man/telinit.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2010 Lennart Poettering
diff --git a/man/timedatectl.xml b/man/timedatectl.xml
index 80f63e8918..dba94d8831 100644
--- a/man/timedatectl.xml
+++ b/man/timedatectl.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2012 Lennart Poettering
diff --git a/man/timesyncd.conf.xml b/man/timesyncd.conf.xml
index d68d9bdd76..812b16e1b9 100644
--- a/man/timesyncd.conf.xml
+++ b/man/timesyncd.conf.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2014 Lennart Poettering
diff --git a/man/tmpfiles.d.xml b/man/tmpfiles.d.xml
index 68ae43eb90..793c124007 100644
--- a/man/tmpfiles.d.xml
+++ b/man/tmpfiles.d.xml
@@ -1,6 +1,8 @@
 <?xml version='1.0'?> <!--*- Mode: nxml; nxml-child-indent: 2; indent-tabs-mode: nil -*-->
 <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2010 Brandon Philips
diff --git a/man/udev.conf.xml b/man/udev.conf.xml
index e104e53f5d..2339e8b9d3 100644
--- a/man/udev.conf.xml
+++ b/man/udev.conf.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2014 Zbigniew Jędrzejewski-Szmek
diff --git a/man/udev_device_get_syspath.xml b/man/udev_device_get_syspath.xml
index 014f43b21c..1eb029f8f9 100644
--- a/man/udev_device_get_syspath.xml
+++ b/man/udev_device_get_syspath.xml
@@ -6,6 +6,8 @@
 ]>
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2015 David Herrmann <dh.herrmann@gmail.com>
diff --git a/man/udev_device_has_tag.xml b/man/udev_device_has_tag.xml
index 480257343c..cdfcd7b727 100644
--- a/man/udev_device_has_tag.xml
+++ b/man/udev_device_has_tag.xml
@@ -6,6 +6,8 @@
 ]>
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2015 David Herrmann <dh.herrmann@gmail.com>
diff --git a/man/udev_device_new_from_syspath.xml b/man/udev_device_new_from_syspath.xml
index 0bb71c8e91..13f1b4ccef 100644
--- a/man/udev_device_new_from_syspath.xml
+++ b/man/udev_device_new_from_syspath.xml
@@ -6,6 +6,8 @@
 ]>
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2015 David Herrmann <dh.herrmann@gmail.com>
diff --git a/man/udev_enumerate_add_match_subsystem.xml b/man/udev_enumerate_add_match_subsystem.xml
index 5acce00bb0..fee861c65d 100644
--- a/man/udev_enumerate_add_match_subsystem.xml
+++ b/man/udev_enumerate_add_match_subsystem.xml
@@ -6,6 +6,8 @@
 ]>
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2015 David Herrmann <dh.herrmann@gmail.com>
diff --git a/man/udev_enumerate_new.xml b/man/udev_enumerate_new.xml
index b5856c5577..e195ad5105 100644
--- a/man/udev_enumerate_new.xml
+++ b/man/udev_enumerate_new.xml
@@ -6,6 +6,8 @@
 ]>
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2015 David Herrmann <dh.herrmann@gmail.com>
diff --git a/man/udev_enumerate_scan_devices.xml b/man/udev_enumerate_scan_devices.xml
index e0b6bfba32..3abfcef84e 100644
--- a/man/udev_enumerate_scan_devices.xml
+++ b/man/udev_enumerate_scan_devices.xml
@@ -6,6 +6,8 @@
 ]>
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2015 David Herrmann <dh.herrmann@gmail.com>
diff --git a/man/udev_list_entry.xml b/man/udev_list_entry.xml
index a1b531d52a..12b48357ff 100644
--- a/man/udev_list_entry.xml
+++ b/man/udev_list_entry.xml
@@ -6,6 +6,8 @@
 ]>
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2015 David Herrmann <dh.herrmann@gmail.com>
diff --git a/man/udev_monitor_filter_update.xml b/man/udev_monitor_filter_update.xml
index f129595618..3590a3ccd6 100644
--- a/man/udev_monitor_filter_update.xml
+++ b/man/udev_monitor_filter_update.xml
@@ -6,6 +6,8 @@
 ]>
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2015 David Herrmann <dh.herrmann@gmail.com>
diff --git a/man/udev_monitor_new_from_netlink.xml b/man/udev_monitor_new_from_netlink.xml
index d73a4acaec..90ce121611 100644
--- a/man/udev_monitor_new_from_netlink.xml
+++ b/man/udev_monitor_new_from_netlink.xml
@@ -6,6 +6,8 @@
 ]>
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2015 David Herrmann <dh.herrmann@gmail.com>
diff --git a/man/udev_monitor_receive_device.xml b/man/udev_monitor_receive_device.xml
index 7e842f88df..abc9615eb5 100644
--- a/man/udev_monitor_receive_device.xml
+++ b/man/udev_monitor_receive_device.xml
@@ -6,6 +6,8 @@
 ]>
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2015 David Herrmann <dh.herrmann@gmail.com>
diff --git a/man/udev_new.xml b/man/udev_new.xml
index 587835a3ca..b4520d7e36 100644
--- a/man/udev_new.xml
+++ b/man/udev_new.xml
@@ -6,6 +6,8 @@
 ]>
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2015 David Herrmann <dh.herrmann@gmail.com>
diff --git a/man/vconsole.conf.xml b/man/vconsole.conf.xml
index 4a6672cbae..fecbfd82bc 100644
--- a/man/vconsole.conf.xml
+++ b/man/vconsole.conf.xml
@@ -3,6 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
+  SPDX-License-Identifier: LGPL-2.1+
+
   This file is part of systemd.
 
   Copyright 2010 Lennart Poettering