Apropos: Difference between revisions
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By default as of NixOS 21.05, <code>apropos</code>, <code>whatis</code> and <code>man -k</code> do not find anything when run, because the man page index cache is not generated. | |||
To generate it manually (and again to update it when new software is installed), run: | To generate it manually (and again to update it when new software is installed), run: | ||
<syntaxhighlight lang= | <syntaxhighlight lang="console"> | ||
$ sudo mkdir -p /var/cache/man/nixos | |||
$ sudo mandb | |||
</syntaxhighlight> | </syntaxhighlight> | ||
To enable automatically building the immutable cache, you can set in your system configuration: | |||
<syntaxhighlight lang="nix"> | |||
{ | |||
documentation.man.generateCaches = true; | |||
} | |||
</syntaxhighlight> | |||
Note that this will rebuild the cache every time you change anything in <code>environment.systemPackages</code>, and will make the <code>mandb</code> command fail. | |||
[[Category:Configuration]] | |||
Latest revision as of 17:51, 18 May 2025
By default as of NixOS 21.05, apropos, whatis and man -k do not find anything when run, because the man page index cache is not generated.
To generate it manually (and again to update it when new software is installed), run:
$ sudo mkdir -p /var/cache/man/nixos
$ sudo mandb
To enable automatically building the immutable cache, you can set in your system configuration:
{
documentation.man.generateCaches = true;
}
Note that this will rebuild the cache every time you change anything in environment.systemPackages, and will make the mandb command fail.