83 lines
2.2 KiB
Groff
83 lines
2.2 KiB
Groff
.\" Title: gpasswd
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.\" Author:
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.\" Generator: DocBook XSL Stylesheets v1.70.1 <http://docbook.sf.net/>
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.\" Date: 06/06/2006
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.\" Manual: User Commands
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.\" Source: User Commands
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.\"
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.TH "GPASSWD" "1" "06/06/2006" "User Commands" "User Commands"
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.\" disable hyphenation
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.nh
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.\" disable justification (adjust text to left margin only)
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.ad l
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.SH "NAME"
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gpasswd \- administer the /etc/group file
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.SH "SYNOPSIS"
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.HP 8
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\fBgpasswd\fR \fIgroup\fR
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.HP 8
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\fBgpasswd\fR \-a\ \fIuser\fR \fIgroup\fR
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.HP 8
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\fBgpasswd\fR \-d\ \fIuser\fR \fIgroup\fR
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.HP 8
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\fBgpasswd\fR \-R\ \fIgroup\fR
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.HP 8
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\fBgpasswd\fR \-r\ \fIgroup\fR
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.HP 8
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\fBgpasswd\fR [\-A\ \fIuser,\fR...] [\-M\ \fIuser,\fR...] \fIgroup\fR
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.SH "DESCRIPTION"
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.PP
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\fBgpasswd\fR
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is used to administer the
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\fI/etc/group\fR
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file (and
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\fI/etc/gshadow\fR
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file if compiled with SHADOWGRP defined). Every group can have administrators, members and a password. System administrator can use
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\fB\-A\fR
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option to define group administrator(s) and
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\fB\-M\fR
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option to define members and has all rights of group administrators and members.
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.SS "Notes about group passwords"
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.PP
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Group passwords are an inherent security problem since more than one person is permitted to know the password. However, groups are a useful tool for permitting co\-operation between different users.
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.\" end of SS subsection "Notes about group passwords"
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.SH "OPTIONS"
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.PP
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Group administrator can add and delete users using
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\fB\-a\fR
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and
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\fB\-d\fR
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options respectively. Administrators can use
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\fB\-r\fR
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option to remove group password. When no password is set only group members can use
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\fBnewgrp\fR
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to join the group. Option
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\fB\-R\fR
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disables access via a password to the group through
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\fBnewgrp\fR
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command (however members will still be able to switch to this group).
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.PP
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\fBgpasswd\fR
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called by a group administrator with group name only prompts for the group password. If password is set the members can still
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\fBnewgrp\fR(1)
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without a password, non\-members must supply the password.
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.SH "FILES"
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.TP 3n
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\fI/etc/group\fR
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Group account information.
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.TP 3n
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\fI/etc/gshadow\fR
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Secure group account information.
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.SH "SEE ALSO"
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.PP
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\fBnewgrp\fR(1),
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\fBgshadow\fR(5),
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\fBgroupadd\fR(8),
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\fBgroupdel\fR(8),
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\fBgroupmod\fR(8),
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\fBgrpck\fR(8),
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\fBgroup\fR(5).
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