Linux command to view user login information

On Linux, To display the currently logged-in user session, you can use the command:

w

20:22:13 up 1:29, 1 user, load average: 0.00, 0.01, 0.00: the current system time and system running time, the current number of logged-in users, and the system’s average load information.

1. USER: username
2. TTY: Login terminal type
3. FROM: Remote terminal address
4. LOGIN@: Login time
5. IDLE: Idle time; this is a timer that will be reset as soon as the user performs any action
6. JCPU: The time is taken by all processes connected to the terminal, including the currently running background job
7. PCPU: Time is taken by the current process
8. WHAT: Tasks currently being performed

Show currently logged in a user session with who command

Show all login names and number of logged-in users

Show the currently logged in user with whoami command