.TH WHO 1 sbase\-VERSION .SH NAME who \- print who has logged on .SH SYNOPSIS .B who .SH DESCRIPTION .B who prints a list of who has logged on, their controlling tty, and the time at which they logged on. .SH BUGS .B who relies on the utmp file to be updated responsibly. This doesn't always happen, which can cause who to print completely bogus data. .SH SEE ALSO .IR utmp (5)