Change group ownership (update the group ID of files.)
Syntax
chgrp [-fhv] [-R [-H | -L | -P]] group file ...
The group operand can be either a group name, or a numeric group ID.
Options
-R Recurse: Change the mode of file hierarchies rooted in the files
instead of just the files themselves.
-R -H Follow symbolic links on the command line
(by default Symbolic links within the tree are not followed.)
-R -L All symbolic links are followed.
-R -P No symbolic links are followed. (default)
-f Force, ignores errors, except for usage errors and doesn't query
about strange modes (unless the user lacks permissions).
-h If the file is a symbolic link, the group ID of the link itself
is changed rather than the file that is pointed to.
-v Verbose, show filenames as the group is modified.
The user invoking chgrp must belong to the specified
group and be the owner of the file, or be the super-user.
The chgrp utility exits 0 on success, and >0 if an error occurs.
In previous versions of this system, symbolic links did not have groups.
The -v option is non-standard and its use in scripts is
not recommended.
Change the group ownership of a file to 'OpsGroup':
$ chgrp OpsGroup /usr/database/demo.dbf
Change the group ownership of a directory and all sub-directories to 'OpsGroup', verbosely display all the filenames affected:
$ chgrp -v -R OpsGroup /usr/database/
“If an organization carries the word 'united' in its name, it means it isn’t, e. g., United Nations, United Arab Republic, United Kingdom, United States” - Professor Charles I. Issawi
chflags - Change a file or folder's flags.
chmod - Change access permissions.
chown - Change file owner and group.
install - Copy files and set attributes.
umask - Users file creation mask.