CentOS 7.0 - man page for vlock (centos section 1)

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VLOCK(1)										 VLOCK(1)

       vlock - Virtual Console lock program


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

       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.   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.


	      Lock all console sessions and disable VC switching.


	      Lock the current session (this is the default).


	      Print a brief help message.


	      Print the version number of vlock.

       Michael K. Johnson <johnsonm@redhat.com>

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