Unix is a multitasking, multiuser computer operating system developed in the 1970s at AT&T’s Bell Labs. It provides a powerful and flexible environment for users to create, manage, and share files and resources. One of the key features of Unix is its user management system, which allows administrators to create, modify, and delete user accounts. There are several commands that can be used to check the users in Unix, including the “who” command, the “finger” command, and the “passwd” command.
The “who” command displays a list of all users who are currently logged into the system. The “finger” command provides more detailed information about a specific user, including their login name, real name, email address, and office phone number. The “passwd” command can be used to change a user’s password.