Group (database)

Group is a name service database used to store group information on Unix-like operating systems. The sources for the group database (and hence the sources for groups on a system) are configured, like other name service databases, in nsswitch.conf.
Seeing available groups on a Unix system.
The contents of the group database (and available groups) can be seen with a variety of tools:
Command line.
The getent command can be used to fetch group information.
Fetching a specific group.
For a specific group called 'users':