#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！
修改系统关键文件的所属组可能导致系统无法启动，请谨慎操作。
#相关命令
#推荐阅读
#手册
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)