Apropos

As of NixOS 18.09, apropos (and likely also whatis) does not find anything when run. This is because the Apropos database is not generated automatically.

To generate it manually (and again to update it when new software is installed), run:

sudo mkdir -p /var/cache/man/nixos
sudo mandb

For more information, see:

• Make NixOS module to update apropos database
• mandb: fix apropos