#Bash 的 chgrp 命令

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

功能

修改文件的所属组。

类型

可执行文件（/usr/bin/chgrp），属于 coreutils。

参数

• OPTION 选项：
  • -c, --changes - 仅对发生变化的文件打印详细信息
  • -f, --silent, --quiet - 忽略大部分错误信息
  • -v, --verbose - 打印详细信息
  • --dereference - 影响符号链接引用的源文件，而非符号链接本身（默认）
  • -h, --no-dereference - 影响符号链接本身，而不是其引用的源文件
  • --no-preserve-root - 不保护 / 目录
  • --preserve-root - 保护 / 目录
  • --reference=RFILE - 引用 RFILE 文件的配置
  • -R, --recursive - 对目录进行递归操作
  • -H - 使用 -R 选项进行递归操作时，指向目录的符号链接只有作为命令行参数时才遍历
  • -L - 使用 -R 选项进行递归操作时，遍历所有指向目录的符号链接
  • -P - 使用 -R 选项进行递归操作时，不遍历任何符号链接（默认）
  • --help - 显示帮助
  • --version - 显示版本
• GROUP - 要设为的所属组
• FILE - 文件列表

#示例

使用组名

$ chgrp primers file.txt                    # 将 file 的所属组设为 primers

使用组 ID

$ chgrp :1001 file.txt                      # 将 file 的所属组 ID 设为 1001

其它

$ chgrp --reference=2.txt 1.txt             # 将 1.txt 的所属组设为和 2.txt 一样
$ chgrp primers -R dir                      # 递归设置目录 dir 中的文件

修改根目录（危险！）

$ chgrp primers --no-preserve-root -R /     # 危险！千万不要执行此命令！

#相关命令

#推荐阅读

• Change group ownership - GNU Coreutils
• chgrp(1) — Linux manual page

#手册

显示
CHGRP(1)                         User Commands                        CHGRP(1)

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

       -f, --silent, --quiet
              suppress most error messages

       -v, --verbose
              output a diagnostic for every file processed

       --dereference
              affect the referent of each symbolic link (this is the default),
              rather than the symbolic link itself

       -h, --no-dereference
              affect symbolic links instead of  any  referenced  file  (useful
              only on systems that can change the ownership of a symlink)

       --no-preserve-root
              do not treat '/' specially (the default)

       --preserve-root
              fail to operate recursively on '/'

       --reference=RFILE
              use  RFILE's group rather than specifying a GROUP.  RFILE is al‐
              ways dereferenced if a symbolic link.

       -R, --recursive
              operate on files and directories recursively

       The following options modify how a hierarchy is traversed when  the  -R
       option  is also specified.  If more than one is specified, only the fi‐
       nal 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

EXAMPLES
       chgrp staff /u
              Change the group of /u to "staff".

       chgrp -hR staff /u
              Change the group of /u and subfiles to "staff".

AUTHOR
       Written by David MacKenzie and Jim Meyering.

REPORTING BUGS
       GNU coreutils online help: <https://www.gnu.org/software/coreutils/>
       Report any translation bugs to <https://translationproject.org/team/>

COPYRIGHT
       Copyright  ©  2023  Free Software Foundation, Inc.  License GPLv3+: GNU
       GPL version 3 or later <https://gnu.org/licenses/gpl.html>.
       This is free software: you are free  to  change  and  redistribute  it.
       There is NO WARRANTY, to the extent permitted by law.

SEE ALSO
       chown(1), chown(2)

       Full documentation <https://www.gnu.org/software/coreutils/chgrp>
       or available locally via: info '(coreutils) chgrp invocation'

GNU coreutils 9.4                 April 2024                          CHGRP(1)