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Fix nix-env documentation for --delete-generations #3048

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Aug 29, 2019
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Fix nix-env documentation for --delete-generations #3048

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1dbaf11
Fix nix-env documentation for --delete-generations
Aug 17, 2019
5bdac86
Reword to clarify newer generations are left alone
toonn Aug 29, 2019
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11 changes: 7 additions & 4 deletions doc/manual/command-ref/nix-env.xml
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Expand Up @@ -1370,10 +1370,13 @@ profile. The generations can be a list of generation numbers, the
special value <literal>old</literal> to delete all non-current
generations, a value such as <literal>30d</literal> to delete all
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.
<literal>+5</literal> to only keep the specified items older than the
current generation. Periodically deleting old generations is important
to make garbage collection effective.</para>
generation that was active at that point in time), or a value such as
<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
effective.</para>

</refsection>

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