'\" t
.\"     Title: newgrp
.\"    Author: [FIXME: author] [see http://docbook.sf.net/el/author]
.\" Generator: DocBook XSL Stylesheets v1.75.2 <http://docbook.sf.net/>
.\"      Date: 2012-02-12
.\"    Manual: 用户命令
.\"    Source: shadow-utils 4.1.5
.\"  Language: Chinese Simplified
.\"
.TH "NEWGRP" "1" "2012-02-12" "shadow\-utils 4\&.1\&.5" "用户命令"
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.SH "名称"
newgrp \- 登录到一个新组
.SH "大纲"
.HP \w'\fBnewgrp\fR\ 'u
\fBnewgrp\fR [\-] [\fIgroup\fR]
.SH "描述"
.PP
The
\fBnewgrp\fR
command is used to change the current group ID during a login session\&. If the optional
\fB\-\fR
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\&.
.PP

\fBnewgrp\fR
changes the current real group ID to the named group, or to the default group listed in
/etc/passwd
if no group name is given\&.
\fBnewgrp\fR
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
/etc/shadow
if this user has an entry in the shadowed password file, or in
/etc/passwd
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\&.
.PP
If there is an entry for this group in
/etc/gshadow, then the list of members and the password of this group will be taken from this file, otherwise, the entry in
/etc/group
is considered\&.
.SH "配置文件"
.PP
在
/etc/login\&.defs
中有如下配置变量，可以用来更改此工具的行为：
.PP
\fBSYSLOG_SG_ENAB\fR (boolean)
.RS 4
允许\(lqsyslog\(rq记录
\fBsg\fR
的活动。
.RE
.SH "文件"
.PP
/etc/passwd
.RS 4
用户账户信息。
.RE
.PP
/etc/shadow
.RS 4
安全用户账户信息。
.RE
.PP
/etc/group
.RS 4
组账户信息。
.RE
.PP
/etc/gshadow
.RS 4
安全组账户信息。
.RE
.SH "参见"
.PP
\fBid\fR(1),
\fBlogin\fR(1),
\fBsu\fR(1),
\fBsg\fR(1),
\fBgpasswd\fR(1),
\fBgroup\fR(5), \fBgshadow\fR(5)\&.