98 lines
3 KiB
Groff
98 lines
3 KiB
Groff
'\" t
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.\" Title: newgrp
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.\" Author: Julianne Frances Haugh
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.\" Generator: DocBook XSL Stylesheets vsnapshot <http://docbook.sf.net/>
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.\" Date: 03/19/2025
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.\" Manual: User Commands
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.\" Source: shadow-utils 4.17.4
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.\" Language: English
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.\"
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.TH "NEWGRP" "1" "03/19/2025" "shadow\-utils 4\&.17\&.4" "User Commands"
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.\" -----------------------------------------------------------------
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.\" * Define some portability stuff
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.\" -----------------------------------------------------------------
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.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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.\" http://bugs.debian.org/507673
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.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html
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.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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.ie \n(.g .ds Aq \(aq
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.el .ds Aq '
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.\" -----------------------------------------------------------------
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.\" * set default formatting
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.\" -----------------------------------------------------------------
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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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.\" -----------------------------------------------------------------
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.\" * MAIN CONTENT STARTS HERE *
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.\" -----------------------------------------------------------------
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.SH "NAME"
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newgrp \- log in to a new group
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.SH "SYNOPSIS"
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.HP \w'\fBnewgrp\fR\ 'u
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\fBnewgrp\fR [\-] [\fIgroup\fR]
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.SH "DESCRIPTION"
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.PP
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The
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\fBnewgrp\fR
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command is used to change the current group ID during a login session\&. If the optional
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\fB\-\fR
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flag is given, the user\*(Aqs environment will be reinitialized as though the user had logged in, otherwise the current environment, including current working directory, remains unchanged\&.
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.PP
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\fBnewgrp\fR
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changes the current real group ID to the named group, or to the default group listed in
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/etc/passwd
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if no group name is given\&.
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\fBnewgrp\fR
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also tries to add the group to the user groupset\&. If not root, the user will be prompted for a password if she does not have a password (in
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/etc/shadow
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if this user has an entry in the shadowed password file, or in
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/etc/passwd
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otherwise) and the group does, or if the user is not listed as a member and the group has a password\&. The user will be denied access if the group password is empty and the user is not listed as a member\&.
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.PP
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If there is an entry for this group in
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/etc/gshadow, then the list of members and the password of this group will be taken from this file, otherwise, the entry in
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/etc/group
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is considered\&.
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.SH "CONFIGURATION"
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.PP
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The following configuration variables in
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/etc/login\&.defs
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change the behavior of this tool:
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.PP
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\fBSYSLOG_SG_ENAB\fR (boolean)
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.RS 4
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Enable "syslog" logging of
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\fBsg\fR
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activity\&.
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.RE
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.SH "FILES"
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.PP
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/etc/passwd
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.RS 4
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User account information\&.
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.RE
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.PP
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/etc/shadow
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.RS 4
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Secure user account information\&.
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.RE
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.PP
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/etc/group
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.RS 4
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Group account information\&.
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.RE
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.PP
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/etc/gshadow
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.RS 4
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Secure group account information\&.
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.RE
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.SH "SEE ALSO"
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.PP
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\fBid\fR(1),
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\fBlogin\fR(1),
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\fBsu\fR(1),
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\fBsg\fR(1),
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\fBgpasswd\fR(1),
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\fBgroup\fR(5), \fBgshadow\fR(5)\&.
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