file] who am i
Show who is logged into the system. With no options, list the names of users currently logged in, their terminal, the time they have been logged in, and the name of the host from which they have logged in. An optional system file (default is /etc/utmp) can be supplied to give additional information.
Print the username of the invoking user.
Print a help message and then exit.
Include idle times. An idle time of . indicates activity within the last minute; one of old indicates no activity in more than a day.
Attempt to include canonical hostnames via DNS.
Same as who am i.
“Quick.” Display only the usernames and total number of users.
Print version information and then exit.
Include user’s message status in the output:
mesg y (write messages allowed)
mesg n (write messages refused)
Cannot find terminal device
This sample output was produced at 8 a.m. on April 17:
who -uHNAME LINE TIME IDLE PID COMMENTS Earvin ttyp3 Apr 16 08:14 16:25 2240 Larry ttyp0 Apr 17 07:33 . 15182
Since Earvin has been idle since yesterday afternoon (16 hours), it appears that he isn’t at work yet. He simply left himself logged in. Larry’s terminal is currently in use.