How to force kick out of a user who is logged on in Linux __linux

Linux is a multi-user operating system, how to force the user to kick out of the system, there are many methods online, such as using PS to find the smallest PID to kill and so on. This is a method passed through the Ubuntu8.04.3 experiment:

1. Find the user to play

Input: Who

Show:

user@cloud-5:~$ who
User Tty7 2009-09-01 03:09 (: 0)
User pts/0 2009-09-01 17:30 (: 0.0)
User Pts/1 2009-09-01 17:47 (10.1.50.249)

2. For example, I want to kick off the console Tty7 's users.

Input: sudo pkill-kill tty7

Show:

user@cloud-5:~$ sudo pkill-kill tty7
[sudo] password for user:

Enter the password to kick out the user

Note: Users who kick out of the console may need root privileges