GROUP(5) Linux Programmer's Manual GROUP(5)
group - user group file
/etc/group is an ASCII file which defines the groups to which users
belong. There is one entry per line, and each line has the format:
The field descriptions are:
the name of the group.
the (encrypted) group password. If this field is empty, no
password is needed.
GID the numerical group ID.
all the group member's usernames, separated by commas.
As the 4.2BSD initgroups(3) man page says: No-one seems to keep
login(1), newgrp(1), getgrent(3), getgrnam(3), passwd(5)
This page is part of release 3.05 of the Linux man-pages project. A
description of the project, and information about reporting bugs, can
be found at http://www.kernel.org/doc/man-pages/.
Linux 1992-12-29 GROUP(5)