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:
The fields are as follows:
- the name of the group.
- the (encrypted) group password. If this field is empty, no password is needed.
- the numeric group ID.
As the 4.2BSD initgroups(3) man page says: no one seems to keep /etc/group up-to-date.
chgrp(1), gpasswd(1), groups(1), login(1), newgrp(1), sg(1), getgrent(3), getgrnam(3), gshadow(5), passwd(5), vigr(8)
- a list of the usernames that are members of this group, separated by commas.