Merge pull request #16056 from keszybz/minor-doc-updates

Minor doc updates
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Lennart Poettering 2020-06-03 19:00:04 +02:00 committed by GitHub
commit 0d63e7dd0b
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4 changed files with 15 additions and 12 deletions

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[Distribution]
Distribution=fedora
Release=31
Release=32
[Output]
Format=gpt_ext4

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<?xml version='1.0'?>
<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd" [
<!ENTITY fedora_latest_version "31">
<!ENTITY fedora_cloud_release "1.9">
<!ENTITY fedora_latest_version "32">
<!ENTITY fedora_cloud_release "1.6">
]>
<!-- SPDX-License-Identifier: LGPL-2.1+ -->

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<term><filename>emergency.target</filename></term>
<listitem>
<para>A special target unit that starts an emergency shell on the main console. This
target does not pull in any services or mounts. It is the most minimal version of
target does not pull in other services or mounts. It is the most minimal version of
starting the system in order to acquire an interactive shell; the only processes running
are usually just the system manager (PID 1) and the shell process. This unit is supposed
to be used with the kernel command line option <varname>systemd.unit=</varname>; it is
also used when a file system check on a required file system fails, and boot-up cannot
are usually just the system manager (PID 1) and the shell process. This unit may be used
by specifying <varname>emergency</varname> on the kernel command line; it is
also used when a file system check on a required file system fails and boot-up cannot
continue. Compare with <filename>rescue.target</filename>, which serves a similar
purpose, but also starts the most basic services and mounts all file systems.</para>
<para>Use the <literal>systemd.unit=emergency.target</literal> kernel command line
option to boot into this mode. A short alias for this kernel command line option is
<literal>emergency</literal>, for compatibility with SysV.</para>
<para>In many ways booting into <filename>emergency.target</filename> is similar to the
effect of booting with <literal>init=/bin/sh</literal> on the kernel command line,
except that emergency mode provides you with the full system and service manager, and
allows starting individual units in order to continue the boot process in steps.</para>
<para>Note that depending on how <filename>emergency.target</filename> is reached, the root file
system might be mounted read-only or read-write (no remounting is done specially for this
target). For example, the system may boot with root mounted read-only when <varname>ro</varname>
is used on the kernel command line and remain this way for <filename>emergency.target</filename>,
or the system may transition to <filename>emergency.target</filename> after the system has been
partially booted and disks have already been remounted read-write.</para>
</listitem>
</varlistentry>
<varlistentry>

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# (at your option) any later version.
[Unit]
Description=Rule-based manager for device events and files
Description=Rule-based Manager for Device Events and Files
Documentation=man:systemd-udevd.service(8) man:udev(7)
DefaultDependencies=no
After=systemd-sysusers.service systemd-hwdb-update.service