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:

group_name:passwd:GID:user_list

The field descriptions are:

the name of the group.
the (encrypted) group password. If this field is empty, no password is needed.
the numerical group ID.
all the group member's user names, separated by commas.

As the 4.2BSD initgroups(3) man page says: Noone seems to keep /etc/group up-to-date.

/etc/group

login(1), newgrp(1), passwd(5)

1992-12-29 Linux

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