'\" t
.\"     Title: groupmems
.\"    Author: George Kraft, IV
.\" Generator: DocBook XSL Stylesheets v1.79.1 <http://docbook.sf.net/>
.\"      Date: 2018-07-27
.\"    Manual: 系统管理命令
.\"    Source: shadow-utils 4.5
.\"  Language: Chinese Simplified
.\"
.TH "GROUPMEMS" "8" "2018-07-27" "shadow\-utils 4\&.5" "系统管理命令"
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.SH "名称"
groupmems \- 用户主组的管理员成员
.SH "大纲"
.HP \w'\fBgroupmems\fR\ 'u
\fBgroupmems\fR \-a\ \fIuser_name\fR | \-d\ \fIuser_name\fR | [\-g\ \fIgroup_name\fR] | \-l | \-p 
.SH "描述"
.PP
The
\fBgroupmems\fR
command allows a user to administer his/her own group membership list without the requirement of superuser privileges\&. The
\fBgroupmems\fR
utility is for systems that configure its users to be in their own name sake primary group (i\&.e\&., guest / guest)\&.
.PP
Only the superuser, as administrator, can use
\fBgroupmems\fR
to alter the memberships of other groups\&.
.SH "选项"
.PP
\fBgroupmems\fR
命令可以接受的选项有：
.PP
\fB\-a\fR, \fB\-\-add\fR\ \&\fIuser_name\fR
.RS 4
Add a user to the group membership list\&.
.sp
If the
/etc/gshadow
file exist, and the group has no entry in the
/etc/gshadow
file, a new entry will be created\&.
.RE
.PP
\fB\-d\fR, \fB\-\-delete\fR\ \&\fIuser_name\fR
.RS 4
从组成员列表中删除用户。
.sp
如果
/etc/gshadow
文件存在，用户将会被从组成员和管理员中移除。
.sp
If the
/etc/gshadow
file exist, and the group has no entry in the
/etc/gshadow
file, a new entry will be created\&.
.RE
.PP
\fB\-g\fR, \fB\-\-group\fR\ \&\fIgroup_name\fR
.RS 4
超级用户可以指定修改哪个组的组成员列表。
.RE
.PP
\fB\-h\fR, \fB\-\-help\fR
.RS 4
现实帮助信息并退出。
.RE
.PP
\fB\-l\fR, \fB\-\-list\fR
.RS 4
列出组成员。
.RE
.PP
\fB\-p\fR, \fB\-\-purge\fR
.RS 4
从组成员列表中删除所有用户。
.sp
If the
/etc/gshadow
file exist, and the group has no entry in the
/etc/gshadow
file, a new entry will be created\&.
.RE
.PP
\fB\-R\fR, \fB\-\-root\fR\ \&\fICHROOT_DIR\fR
.RS 4
Apply changes in the
\fICHROOT_DIR\fR
directory and use the configuration files from the
\fICHROOT_DIR\fR
directory\&.
.RE
.SH "SETUP"
.PP
The
\fBgroupmems\fR
executable should be in mode
2770
as user
\fIroot\fR
and in group
\fIgroups\fR\&. The system administrator can add users to group
\fIgroups\fR
to allow or disallow them using the
\fBgroupmems\fR
utility to manage their own group membership list\&.
.sp
.if n \{\
.RS 4
.\}
.nf
	$ groupadd \-r groups
	$ chmod 2770 groupmems
	$ chown root\&.groups groupmems
	$ groupmems \-g groups \-a gk4
    
.fi
.if n \{\
.RE
.\}
.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
\fBMAX_MEMBERS_PER_GROUP\fR (number)
.RS 4
每个组条目的最大成员数。达到最大值时，在
/etc/group
开始一个新条目(行)(使用同样的名称，同样的密码，同样的 GID)。
.sp
默认值是 0，意味着组中的成员数没有限制。
.sp
此功能(分割组)允许限制组文件中的行长度。这对于确保 NIS 组的行比长于 1024 字符。
.sp
如果要强制这个限制，可以使用 25。
.sp
注意：分割组可能不受所有工具的支持(甚至在 Shadow 工具集中)。您不应该使用这个变量，除非真的需要。
.RE
.SH "文件"
.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
\fBchfn\fR(1),
\fBchsh\fR(1),
\fBpasswd\fR(1),
\fBgroupadd\fR(8),
\fBgroupdel\fR(8),
\fBuseradd\fR(8),
\fBuserdel\fR(8),
\fBusermod\fR(8)\&.