32v 1m who

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 /etc/utmp 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)