Customizing password checking
utility also allows you to customize password
The file /etc/default/goodpw
contains the password control settings. These settings allow you to
specify if passwords are checked against dictionary words, word rotations,
and user, group, and system names.
You can also define regular expressions (character combinations and arrangements) that all passwords must match (or not match) with the files /usr/lib/goodpw/match and /usr/lib/goodpw/reject, respectively. See goodpw(ADM) for more information.