4.3BSD-UWisc/man/cat1/who.1

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WHO(1)              UNIX Programmer's Manual               WHO(1)



NAME
     who - who is on the system

SYNOPSIS
     who [ who-file ] [ am I ]

DESCRIPTION
     _W_h_o, without an argument, lists the login name, terminal
     name, and login time for each current UNIX user.

     Without an argument, _w_h_o examines the /_e_t_c/_u_t_m_p file to
     obtain its information.  If a file is given, that file is
     examined.  Typically the given file will be /usr/adm/wtmp,
     which contains a record of all the logins since it was
     created.  Then _w_h_o lists logins, logouts, and crashes since
     the creation of the wtmp file.  Each login is listed with
     user name, terminal name (with `/dev/' suppressed), and date
     and time.  When an argument is given, logouts produce a
     similar line without a user name.  Reboots produce a line
     with `x' in the place of the device name, and a fossil time
     indicative of when the system went down.

     With two arguments, as in `who am I' (and also `who are
     you'), _w_h_o tells who you are logged in as.

FILES
     /etc/utmp

SEE ALSO
     getuid(2), utmp(5)

























Printed 12/27/86         April 29, 1985                         1