Let's say the group name of user1 is xyz.Is it possible, in the same Linux machine, that the username of some other user (not user1) is xyz?
Can group name of a user and the username of some other user be the same?
linux;users;group
Yes, it is possible but I wouldn't recommend it as it would be confusing.Actually it is common practice in most UNIXes and Linux distros, when user xyz is created, to automatically create a group named xyz and assign to it user xyz as its (only) member. 