NAME    [Toc]    [Back]

     lock - reserve a terminal

SYNOPSIS    [Toc]    [Back]

     lock [-n] [-p] [-a style] [-t timeout]

DESCRIPTION    [Toc]    [Back]

     lock requests a password from the user, reads it  again  for
verification
     and then will normally not relinquish the terminal until the
password is
     repeated.  There are two other  conditions  under  which  it
will terminate:
     it  will  timeout  after some interval of time and it may be
killed by someone
 with the appropriate privileges.

     The options are as follows:

     -n      Don't use a timeout value.  Terminal will be  locked
forever.

     -p      A password is not requested, instead the user's current login
             password is used.  If the user  has  an  S/Key  key,
they may also
             use  it to unlock the terminal.  To do this the user
should enter
             "s/key" at the unlock  ``Key:''  prompt.   The  user
will then be issued
  an  S/Key  challenge to which they may respond
with a six-word
             S/Key one-time password.

     -a style
             The specified BSD  Authentication  login  style  (as
specified in
             /etc/login.conf)  will  be  used to authenticate the
user.  If the
             particular style requires a challenge/response handshake or a
             special  prompt,  the user may enter the name of the
style to get
             the standard prompt for that style.

     -t timeout
             The time limit (default 15 minutes)  is  changed  to
timeout minutes.

SEE ALSO    [Toc]    [Back]

     skey(1), login.conf(5)

HISTORY    [Toc]    [Back]

     The lock command appeared in 3.0BSD.

OpenBSD      3.6                           June      6,      1993