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+'\" t
+.\" Title: groupadd
+.\" Author: Julianne Frances Haugh
+.\" Generator: DocBook XSL Stylesheets vsnapshot <http://docbook.sf.net/>
+.\" Date: 2022-11-08
+.\" Manual: 系统管理命令
+.\" Source: shadow-utils 4.13
+.\" Language: Chinese Simplified
+.\"
+.TH "GROUPADD" "8" "2022-11-08" "shadow\-utils 4\&.13" "系统管理命令"
+.\" -----------------------------------------------------------------
+.\" * Define some portability stuff
+.\" -----------------------------------------------------------------
+.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+.\" http://bugs.debian.org/507673
+.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html
+.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+.ie \n(.g .ds Aq \(aq
+.el .ds Aq '
+.\" -----------------------------------------------------------------
+.\" * set default formatting
+.\" -----------------------------------------------------------------
+.\" disable hyphenation
+.nh
+.\" disable justification (adjust text to left margin only)
+.ad l
+.\" -----------------------------------------------------------------
+.\" * MAIN CONTENT STARTS HERE *
+.\" -----------------------------------------------------------------
+.SH "名称"
+groupadd \- 创建一个新组
+.SH "大纲"
+.HP \w'\fBgroupadd\fR\ 'u
+\fBgroupadd\fR [\fI选项\fR] \fINEWGROUP\fR
+.SH "描述"
+.PP
+The
+\fBgroupadd\fR
+command creates a new group account using the values specified on the command line plus the default values from the system\&. The new group will be entered into the system files as needed\&.
+.PP
+Groupnames may contain only lower and upper case letters, digits, underscores, or dashes\&. They can end with a dollar sign\&. Dashes are not allowed at the beginning of the groupname\&. Fully numeric groupnames and groupnames \&. or \&.\&. are also disallowed\&.
+.PP
+Groupnames may only be up to 32 characters long\&.
+.SH "选项"
+.PP
+The options which apply to the
+\fBgroupadd\fR
+command are:
+.PP
+\fB\-f\fR, \fB\-\-force\fR
+.RS 4
+This option causes the command to simply exit with success status if the specified group already exists\&. When used with
+\fB\-g\fR, and the specified GID already exists, another (unique) GID is chosen (i\&.e\&.
+\fB\-g\fR
+is turned off)\&.
+.RE
+.PP
+\fB\-g\fR, \fB\-\-gid\fR\ \&\fIGID\fR
+.RS 4
+The numerical value of the group\*(Aqs ID\&.
+\fIGID\fR
+must be unique, unless the
+\fB\-o\fR
+option is used\&. The value must be non\-negative\&. The default is to use the smallest ID value greater than or equal to
+\fBGID_MIN\fR
+and greater than every other group\&.
+.sp
+See also the
+\fB\-r\fR
+option and the
+\fBGID_MAX\fR
+description\&.
+.RE
+.PP
+\fB\-h\fR, \fB\-\-help\fR
+.RS 4
+显示帮助信息并退出。
+.RE
+.PP
+\fB\-K\fR, \fB\-\-key\fR\ \&\fIKEY\fR=\fIVALUE\fR
+.RS 4
+Overrides
+/etc/login\&.defs
+defaults (GID_MIN, GID_MAX and others)\&. Multiple
+\fB\-K\fR
+options can be specified\&.
+.sp
+Example:
+\fB\-K\fR\ \&\fIGID_MIN\fR=\fI100\fR\ \&
+\fB\-K\fR\ \&\fIGID_MAX\fR=\fI499\fR
+.sp
+Note:
+\fB\-K\fR\ \&\fIGID_MIN\fR=\fI10\fR,\fIGID_MAX\fR=\fI499\fR
+doesn\*(Aqt work yet\&.
+.RE
+.PP
+\fB\-o\fR, \fB\-\-non\-unique\fR
+.RS 4
+permits the creation of a group with an already used numerical ID\&. As a result, for this
+\fIGID\fR, the mapping towards group
+\fINEWGROUP\fR
+may not be unique\&.
+.RE
+.PP
+\fB\-p\fR, \fB\-\-password\fR\ \&\fIPASSWORD\fR
+.RS 4
+defines an initial password for the group account\&. PASSWORD is expected to be encrypted, as returned by
+\fBcrypt \fR(3)\&.
+.sp
+Without this option, the group account will be locked and with no password defined, i\&.e\&. a single exclamation mark in the respective field of ths system account file
+/etc/group
+or
+/etc/gshadow\&.
+.sp
+\fBNote:\fR
+This option is not recommended because the password (or encrypted password) will be visible by users listing the processes\&.
+.sp
+您应该确保密码符合系统的密码政策。
+.RE
+.PP
+\fB\-r\fR, \fB\-\-system\fR
+.RS 4
+创建一个系统组。
+.sp
+The numeric identifiers of new system groups are chosen in the
+\fBSYS_GID_MIN\fR\-\fBSYS_GID_MAX\fR
+range, defined in
+login\&.defs, instead of
+\fBGID_MIN\fR\-\fBGID_MAX\fR\&.
+.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\&. Only absolute paths are supported\&.
+.RE
+.PP
+\fB\-P\fR, \fB\-\-prefix\fR\ \&\fIPREFIX_DIR\fR
+.RS 4
+Apply changes to configuration files under the root filesystem found under the directory
+\fIPREFIX_DIR\fR\&. This option does not chroot and is intended for preparing a cross\-compilation target\&. Some limitations: NIS and LDAP users/groups are not verified\&. PAM authentication is using the host files\&. No SELINUX support\&.
+.RE
+.PP
+\fB\-U\fR, \fB\-\-users\fR
+.RS 4
+A list of usernames to add as members of the group\&.
+.sp
+The default behavior (if the
+\fB\-g\fR,
+\fB\-N\fR, and
+\fB\-U\fR
+options are not specified) is defined by the
+\fBUSERGROUPS_ENAB\fR
+variable in
+/etc/login\&.defs\&.
+.RE
+.SH "配置文件"
+.PP
+The following configuration variables in
+/etc/login\&.defs
+change the behavior of this tool:
+.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
+.PP
+/etc/login\&.defs
+.RS 4
+Shadow 密码套件配置。
+.RE
+.SH "CAVEATS"
+.PP
+You may not add a NIS or LDAP group\&. This must be performed on the corresponding server\&.
+.PP
+If the groupname already exists in an external group database such as NIS or LDAP,
+\fBgroupadd\fR
+will deny the group creation request\&.
+.SH "退出值"
+.PP
+The
+\fBgroupadd\fR
+command exits with the following values:
+.PP
+\fI0\fR
+.RS 4
+success
+.RE
+.PP
+\fI2\fR
+.RS 4
+invalid command syntax
+.RE
+.PP
+\fI3\fR
+.RS 4
+invalid argument to option
+.RE
+.PP
+\fI4\fR
+.RS 4
+GID is already used (when called without
+\fB\-o\fR)
+.RE
+.PP
+\fI9\fR
+.RS 4
+group name is already used
+.RE
+.PP
+\fI10\fR
+.RS 4
+can\*(Aqt update group file
+.RE
+.SH "参见"
+.PP
+\fBchfn\fR(1),
+\fBchsh\fR(1),
+\fBpasswd\fR(1),
+\fBgpasswd\fR(8),
+\fBgroupdel\fR(8),
+\fBgroupmod\fR(8),
+\fBlogin.defs\fR(5),
+\fBuseradd\fR(8),
+\fBuserdel\fR(8),
+\fBusermod\fR(8)\&.