.TH utmp "" "" "System Administration"
.PC "File that notes login events that are active"
.B /etc/utmp
.PP
.II /etc/utmp
File
.B /etc/utmp
notes every login event that is active \(em that is, when the user
has logged in and has not yet logged out.
It is read by the command
.B who
to display the users who are now logged into your system.
.PP
.B utmp
records each active login event as a record of type
.BR utmp ,
which is defined in header file
.BR <utmp> .
For details, see the Lexicon entry
.BR utmp.h .
.PP
File
.B /usr/adm/wtmp
records every login event that has concluded.
You can comb this file to trace which user have logged onto your system,
and when.
.SH "See Also"
.Xr "Adminstering COHERENT," adminste
.Xr "utmp.h," utmp.h
.Xr "wtmp" wtmp
