chgrp

# chgrp [-cfhRv][--help][--version][group][file or directory...]
# -c or --changes works like the "-v" parameter, but only returns the changed part.
# -f or --quiet or --silent does not display an error message.
# -h or --no-dereference Modifies only the symbols attached to the file, without changing any other related files.
# -R or --recursive Recursive processing, processing all files and subdirectories under the specified directory.
# -v or --verbose Displays the instruction execution process.
# --help Online help.
# --reference=<reference file or directory> Sets the group to which the specified file or directory belongs to be the same as the group to which the reference file or directory belongs.
# --version Displays version information.