Lists the user currently logged on to the system
who
root@ubuntu:/# who
root pts/0 2017-03-01 09:51 (192.168.3.151)
root pts/1 2017-03-01 18:27 (192.168.3.129)
root pts/2 2017-03-01 18:27 (192.168.3.144)
root pts/3 2017-03-01 18:27 (192.168.3.151)
Close to a user logged into the system
fuser -k / dev / pts / User ID
root@ubuntu:/# fuser -k /dev/pts/3 /dev/pts/3: 9339
View the current logged-on user
tty
root@ubuntu:/# tty
/dev/pts/1
