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Reword to clarify newer generations are left alone

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My attempt at clarifying the docs resulted in a false explanation. This
is now fixed and I added an example to eliminate all possible confusion.
This commit is contained in:
toonn 2019-08-29 13:46:38 +02:00
parent 1dbaf11948
commit 5bdac86be2
1 changed files with 4 additions and 1 deletions
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doc/manual/command-ref/nix-env.xml
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@ -1371,7 +1371,10 @@ special value <literal>old</literal> to delete all non-current
generations, a value such as <literal>30d</literal> to delete all generations, a value such as <literal>30d</literal> to delete all
generations older than the specified number of days (except for the generations older than the specified number of days (except for the
generation that was active at that point in time), or a value such as generation that was active at that point in time), or a value such as
<literal>+5</literal> to only keep the specified number of generations. <literal>+5</literal> to keep the last <literal>5</literal> generations
ignoring any newer than current, e.g., if <literal>30</literal> is the current
generation <literal>+5</literal> will delete generation <literal>25</literal>
and all older generations.
Periodically deleting old generations is important to make garbage collection Periodically deleting old generations is important to make garbage collection
effective.</para> effective.</para>