chgrp -p 存在嗎？

任何版本的 chgrp 命令都有 -p 選項嗎？如果是這樣，-p 選項有什麼作用？我知道 -P 選項。

範例用法：

chgrp -p folder group

其中文件夾是一個文件夾並分組一個組。

不。chgrp來自 GNU coreutils 的沒有-p選項：

# chgrp --help
Usage: chgrp [OPTION]... GROUP FILE...
 or:  chgrp [OPTION]... --reference=RFILE FILE...
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 value
 -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 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

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

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

還：

# chgrp -p 
chgrp: invalid option -- 'p'
Try 'chgrp --help' for more information.

引用自：https://unix.stackexchange.com/questions/673209