How to Change Group Ownership of a File

1. If you are not the owner of the file or directory, become superuser.

   Only the current owner or superuser can use the chgrp command to change the group of a file or directory.

2. Change the group owner of a file by using the chgrp command.

   $ chgrp group filename

   group	Name of the new group of the file or directory.
   filename	File or directory.

3. Verify the group owner of the file is changed.

   $ ls -l filename

Example--Changing Group Ownership of a File

The following example sets the group ownership on myfile to the group scifi.

$ chgrp scifi myfile
$ ls -l myfile
-rwxrw-- 1 rimmer scifi 12985 Nov 12 16:28 myfile