The group membership in Linux is controlled through the /etc/group file. This is a simple text file that contains a list of groups and the members belonging to each group. Just like the /etc/passwd file, the /etc/group file consists of a series of colon-delimited lines, each of which defines a single group.

What are group file permissions?

Basics. There are three sets of permissions to worry about with any directory/file: User – What the owner of the file can do. Group – What users of the same group can do. Other – What anyone else can do.

What is group ownership of file?

Specifies the group name or GID of the new group of the file or directory. filename. Specifies the file or directory. For information on setting up groups, see “Managing User Accounts and Groups (Overview)” in System Administration Guide: Basic Administration . Verify that the group owner of the file has changed.