'\" t
.\"     Title: grpck
.\"    Author: Julianne Frances Haugh
.\" 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 "GRPCK" "8" "2018-07-27" "shadow\-utils 4\&.5" "系统管理命令"
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.SH "名称"
grpck \- 检查组文件的完整性
.SH "大纲"
.HP \w'\fBgrpck\fR\ 'u
\fBgrpck\fR [选项] [\fIgroup\fR\ [\ \fIshadow\fR\ ]]
.SH "描述"
.PP
The
\fBgrpck\fR
command verifies the integrity of the groups information\&. It checks that all entries in
/etc/group
and /etc/gshadow
have the proper format and contain valid data\&. The user is prompted to delete entries that are improperly formatted or which have other uncorrectable errors\&.
.PP
检查的项目有：
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
正确的字段数
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
一个唯一且有效的组名
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
有效的组标识符
(仅 /etc/group)
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
有效的成员和
管理员
列表。
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
a corresponding entry in the
/etc/gshadow
file (respectively
/etc/group
for the
gshadow
checks)
.RE
.PP
The checks for correct number of fields and unique group name are fatal\&. If an entry has the wrong number of fields, the user will be prompted to delete the entire line\&. If the user does not answer affirmatively, all further checks are bypassed\&. An entry with a duplicated group name is prompted for deletion, but the remaining checks will still be made\&. All other errors are warnings and the user is encouraged to run the
\fBgroupmod\fR
command to correct the error\&.
.PP
The commands which operate on the
/etc/group
and /etc/gshadow files
are not able to alter corrupted or duplicated entries\&.
\fBgrpck\fR
should be used in those circumstances to remove the offending entries\&.
.SH "选项"
.PP
\fB\-r\fR
和
\fB\-s\fR
选项不能联合使用。
.PP
\fBgrpck\fR
可以接受的选项有：
.PP
\fB\-h\fR, \fB\-\-help\fR
.RS 4
现实帮助信息并退出。
.RE
.PP
\fB\-r\fR, \fB\-\-read\-only\fR
.RS 4
Execute the
\fBgrpck\fR
command in read\-only mode\&. This causes all questions regarding changes to be answered
\fIno\fR
without user intervention\&.
.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
.PP
\fB\-s\fR, \fB\-\-sort\fR
.RS 4
根据 GID 在
/etc/group和 /etc/gshadow
中进行排序。
.RE
.PP
By default,
\fBgrpck\fR
operates on
/etc/group
and /etc/gshadow\&. The user may select alternate files with the
\fIgroup\fR
and \fIshadow\fR parameters\&.
.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
.PP
/etc/passwd
.RS 4
用户账户信息。
.RE
.SH "退出值"
.PP
\fBgrpck\fR
可以返回如下值：
.PP
\fI0\fR
.RS 4
成功
.RE
.PP
\fI1\fR
.RS 4
无效的命令语法
.RE
.PP
\fI2\fR
.RS 4
一个或多个坏掉的组条目
.RE
.PP
\fI3\fR
.RS 4
无法打开组文件
.RE
.PP
\fI4\fR
.RS 4
无法锁定组文件
.RE
.PP
\fI5\fR
.RS 4
无法更新组文件
.RE
.SH "参见"
.PP
\fBgroup\fR(5),
\fBgroupmod\fR(8),
\fBgshadow\fR(5),\fBpasswd\fR(5),
\fBpwck\fR(8),
\fBshadow\fR(5)\&.