NAME
who - print list of currently logged in users
SYNOPSIS
who [file]
EXAMPLES
who # 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 ALSO
utmp(5).