You must be a root administrator premise
use w view the user currently logged on the system, where users also use other root, other users to see if a user name in the first column of the display to identify USER
Use last -5 Log in to view the last five records login information for login status
Kick user command
fuser -k / dev / PTS / 0
--- command interpreter:
fuser: dry him (Fuck the User)
-k: Kill (the kill)
/ dev / PTS / 0: 0 virtual terminal
TTY indicates that the terminal device
pts represents a virtual terminal equipment
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