The fourth field is the group identifier.

The group identifier is a necessary component of Unix file systems and processes.

The limits on the range of possible group identifiers come from the memory space used to store them.

Change the owner of to 'rob' and the group identifier to 'developers'.

Change the group identifier of to 512 (regardless of whether a group name is associated with the identifier 512 or not).

The group identifier may be up to 5 digits long; e.g. 99936 is a group identifier for the country Bhutan.

The group identifier has only been used by non-Aborigines since the 1980s.

The Black Power movement defiantly embraced Black as a group identifier.

Sets the user identifier, uid, and group identifier, gid, for all files on the filesystem.

Books published in rare languages typically have longer group identifiers.