diff options
Diffstat (limited to 'doc/manual/command-ref')
| -rw-r--r-- | doc/manual/command-ref/nix-env.xml | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/doc/manual/command-ref/nix-env.xml b/doc/manual/command-ref/nix-env.xml index 9d13d3014e1b..c8c01f9a44fa 100644 --- a/doc/manual/command-ref/nix-env.xml +++ b/doc/manual/command-ref/nix-env.xml @@ -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 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 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 effective.</para> |