====== Kill remote SSH users ======
<code bash>
> who  
mmrozek  tty1         Aug 17 10:03  
mmrozek  pts/3        Aug 17 10:09 (:pts/2:S.0)

> ps t  
PID   TTY      STAT   TIME COMMAND  
30737 pts/3    Ss     0:00 zsh

> echo "HAHAHAHAHAHAHAHA" | write mmrozek pts/3

> kill -9 30737
</code>