Linux - one command per day--chgrp

Date: 2011-11-27



chgrp(change group)NAME

chgrp - change group ownership

SYNOPSIS

chgrp [OPTION]... GROUP FILE...

chgrp [OPTION]... --reference=RFILE FILE...

DESCRIPTION

Change the group of each FILE to GROUP. With --reference, change the

group of each FILE to that of RFILE.

-c, --changes

like verbose but report only when a change is made

--dereference

affect the referent of each symbolic link (this is the default),

rather than the symbolic link itself

-h, --no-dereference

affect each symbolic link instead of any referenced file (useful

only on systems that can change the ownership of a symlink)

do not treat `/' specially (the default) do not treat `/' specially (the default)

--preserve-root

fail to operate recursively on `/'

-f, --silent, --quiet

suppress most error messages

--reference=RFILE

use RFILE's group rather than specifying a GROUP value

-R, --recursive

operate on files and directories recursively

-v, --verbose

output a diagnostic for every file processed

The following options modify how a hierarchy is traversed when the -R

option is also specified. If more than one is specified, only the

final one takes effect.

-H if a command line argument is a symbolic link to a directory,

traverse it

-L traverse every symbolic link to a directory encountered

-P do not traverse any symbolic links (default)

--help display this help and exit

--version

output version information and exit

chgrp(change group)

功能说明：变更文件或目录的所属群组。

语　　法：chgrp [-cfhRv][--help][--version][所属群组][文件或目录...] 或 chgrp [-cfhRv][--help][--reference=<参考文件或目录>][--version][文件或目录...]

补充说明：在UNIX系统家族里，文件或目录权限的掌控以拥有者及所属群组来管理。您可以使用chgrp指令去变更文件与目录的所属群组，设置方式采用群组名称或群组识别码皆可。

参　　数：

　-c或--changes 效果类似"-v"参数，但仅回报更改的部分。

　-f或--quiet或--silent 　不显示错误信息。

　-h或--no-dereference 　只对符号连接的文件作修改，而不更动其他任何相关文件。

　-R或--recursive 　递归处理，将指定目录下的所有文件及子目录一并处理。

　-v或--verbose 　显示指令执行过程。

　--help 　在线帮助。

　--reference=<参考文件或目录> 　把指定文件或目录的所属群组全部设成和参考文件或目录的所属群组相同。

　--version 　显示版本信息。