Skip site navigation (1)Skip section navigation (2)

FreeBSD Man Pages

Man Page or Keyword Search:
Man Architecture
Apropos Keyword Search (all sections) Output format
home | help
GROUP(5)		  FreeBSD File Formats Manual		      GROUP(5)

NAME
     group -- format of	the group permissions file

DESCRIPTION
     The group file is the local source	of group information.  It can be used
     in	conjunction with the Hesiod domain `group', and	the NIS	maps
     `group.byname' and	`group.bygid', as controlled by	nsswitch.conf(5).

     The file group consists of	newline	separated ASCII	records, one per
     group, containing four colon `:' separated	fields.	 These fields are as
     follows:
	   group     Name of the group.
	   passwd    Group's encrypted password.
	   gid	     The group's decimal ID.
	   member    Group members.

     Lines whose first non-whitespace character	is a pound-sign	(#) are	com-
     ments, and	are ignored.  Blank lines that consist only of spaces, tabs or
     newlines are also ignored.

     The group field is	the group name used for	granting file access to	users
     who are members of	the group.  The	gid field is the number	associated
     with the group name.  They	should both be unique across the system	(and
     often across a group of systems) since they control file access.  The
     passwd field is an	optional encrypted password.  This field is rarely
     used and an asterisk is normally placed in	it rather than leaving it
     blank.  The member	field contains the names of users granted the privi-
     leges of group.  The member names are separated by	commas without spaces
     or	newlines.  A user is automatically in a	group if that group was	speci-
     fied in their /etc/passwd entry and does not need to be added to that
     group in the group	file.

LIMITS
     There are various limitations which are explained in the function where
     they occur; see section SEE ALSO.

     In	older implementations, a group cannot have more	than 200 members.  The
     maximum line length of /etc/group is 1024 characters.  Longer lines will
     be	skipped.  This limitation disappeared in FreeBSD 3.0.  Older binaries
     that are statically linked, depend	on old shared libraries, or
     non-FreeBSD binaries in compatibility mode	may still have this limit.

FILES
     /etc/group

SEE ALSO
     passwd(1),	setgroups(2), crypt(3),	getgrent(3), initgroups(3),
     nsswitch.conf(5), passwd(5), chkgrp(8), pw(8), yp(8)

BUGS
     The passwd(1) command does	not change the group passwords.

HISTORY
     A group file format appeared in Version 6 AT&T UNIX.  Support for com-
     ments first appeared in FreeBSD 3.0.

FreeBSD	10.1		      September	29, 1994		  FreeBSD 10.1

NAME | DESCRIPTION | LIMITS | FILES | SEE ALSO | BUGS | HISTORY

Want to link to this manual page? Use this URL:
<http://www.freebsd.org/cgi/man.cgi?query=group&sektion=5&manpath=FreeBSD+5.5-RELEASE>

home | help