WHO(1)WHO(1)NAMEwho - print list of currently logged in users
SYNOPSISwho [file]
EXAMPLESwho # Print user names, terminals and times
DESCRIPTION
Who prints a list of currently logged in users. For each one, the user
name, terminal, and login time is printed. This program gets its
information from the file /etc/utmp, which is updated by init and
login. If the file does not exist, neither of these will create it,
and who will not work. Note that if you decide to create an empty
/usr/adm/wtmp to enable the login accounting, it will grow forever and
eventually fill up your disk unless you manually truncate it from time
to time. If an optional file name is provided, the logins in that file
will be printed.
SEE ALSOutmp(5).
WHO(1)