SYNOPSIS
       deallocvt [N ...]

DESCRIPTION
       The command deallocvt deallocates kernel memory and data structures for
       all unused virtual consoles.  If one  or  more  arguments  N  ...   are
       given, only the corresponding consoles /dev/ttyN are deallocated.

       A virtual console is unused if it is not the foreground console, and no
       process has it open for reading  or  writing,  and  no  text  has  been
       selected on its screen.

SEE ALSO
       chvt(1), openvt(1)