chgrp - change group ownership of files
$ chgrp <gid> <path...>
$ chgrp <name> <path...>
chgrp
called as root or as file owner changes owning group of specified path
to gid
or name
.
-h
,--no-dereference
: Don't follow symlinks
# Change group of README.md to 111
# chgrp 111 README.md
# Change group of README.md to root
# chgrp root README.md
chmod
(1)chown
(1)