How do I list the groups in Linux?

To view all groups present on the system simply open the /etc/group file. Each line in this file represents information for one group. Another option is to use the getent command which displays entries from databases configured in /etc/nsswitch.

How do I show the group name in Linux?

Open the terminal application. Run command on the folder: ls -ld /path/to/folder. To find owner and group of a directory named /etc/ use: stat /etc/ Use the Linux and Unix GUI file manager to locate the group name of the folder.