group - user group file

As the 4.2BSD initgroups(3) man page says: no one seems to keep /etc/group up-to-date.

The /etc/group file is a text file that defines the groups on the system. There is one entry per line, with the following format: group_name:password:GID:user_list The fields are as follows: group_name the name of the group. password the (encrypted) group password. If this field is empty, no password is needed. GID the numeric group ID. user_list a list of the usernames that are members of this group, separated by commas.

group - user group file

chgrp(1), gpasswd(1), groups(1), login(1), newgrp(1), sg(1), getgrent(3), getgrnam(3), gshadow(5), passwd(5), vigr(8) Linux man-pages 6.9.1 2024-05-02 group(5)