WHO(1)                                                                  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)



7th Edition                     April 29, 1985                          WHO(1)