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VLOCK(1)										 VLOCK(1)

NAME
       vlock - Virtual Console lock program

SYNOPSIS
       vlock

       vlock [ -a,--all ] [ -c,--current ] [ -h,--help ] [ -v,--version ]

DESCRIPTION
       vlock  is a program to lock one or more sessions on the Linux console.  This is especially
       useful for Linux machines which have multiple users with access to the console.	One  user
       may lock his or her session(s) while still allowing other users to use the system on other
       virtual consoles.  If desired, the entire  console  may	be  locked  and  virtual  console
       switching disabled.

       By  default, only the current VC (virtual console) is locked.  With the -a,-all option all
       VCs are locked.	The locked VCs cannot be unlocked without the invoker's password  or  the
       root password.  The root password will always be able to unlock any or all sessions.  And,
       for the paranoid, vlock makes it a trying experience for those  attempting  to  guess  the
       password, so unauthorized access to session(s) is highly unlikely.

       Please  note  that  it is entirely possible to completely lock yourself out of the console
       with the -a,--all option if you cannot remember your password!  Unless  you  are  able  to
       kill  vlock  by	logging in remotely via a serial terminal or network, a hard reset is the
       only method of ``unlocking'' the display.

       vlock works for console sessions primarily.  However, there is support for trying to  lock
       non-console sessions as well, but that support has not been well tested.

OPTIONS
       -a,--all

	      Lock all console sessions and disable VC switching.

       -c,--current

	      Lock the current session (this is the default).

       -h,--help

	      Print a brief help message.

       -v,--version

	      Print the version number of vlock.

AUTHOR
       Michael K. Johnson <johnsonm@redhat.com>

Linux User's Manual			   16 May 1996					 VLOCK(1)
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