GROUP(5) - man page online | file formats

User group file.

GROUP(5)                            Linux Programmer's Manual                            GROUP(5)

NAME group - user group file
DESCRIPTION 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.
FILES /etc/group
BUGS As the 4.2BSD initgroups(3) man page says: No-one seems to keep /etc/group up-to-date.
SEE ALSO login(1), newgrp(1), getgrent(3), getgrnam(3), passwd(5)
COLOPHON This page is part of release 4.04 of the Linux man-pages project. A description of the project, information about reporting bugs, and the latest version of this page, can be found at
Linux 2010-10-21 GROUP(5)
This manual Reference Other manuals
group(5) referred by aer(5) | calife(1) | Catmandu::Iterable(3pm) | conflict(8mh) | cpgr(8) | cppw(8) | dacs.quick(7) | ext_unix_group_acl(8) | fgetgrent(3) | ftpasswd(8) | ftpd(8) | getgrent(3) | getgrent_r(3) | getgrnam(3) | getgrouplist(3) | gpasswd(1) | groff_mdoc(7) | group_member(3) | grpck(8) | gshadow(5)
refer to getgrent(3) | getgrnam(3) | initgroups(3) | login(1) | newgrp(1) | passwd(5)