NAME

       zerofill - clear unused disk space and blank devices.

SYNOPSIS

       zerofill [options] [devices] ...

DESCRIPTION

       This  command  is  a  relative of nullfile.  Like nullfile, it can be used to write all unused disk space
       with '0', thereby making file systems that are stored on virtual machines easier to pack.   In  addition,
       zerofill  can  fill  unused  disk  space  with  random data before zeroing, which can be useful to remove
       forensic trace of deleted files.  Finally, zerofile can be told to operate on and zero  (erase)  complete
       disk devices.

OPTIONS

       --random=count
              Number of passes to use writing random data before wiping data.

       --help Outputs help screen for the user.

AUTHOR

       zerofill was written by David Sugar <dyfet@gnutelephony.org>.

REPORTING BUGS

       Report bugs to bug-commoncpp@gnu.org or bugs@gnutelephony.org.

COPYRIGHT

       Copyright © 2010-2014 David Sugar, Tycho Softworks.
       This  is  free  software;  see  the  source  for  copying conditions.  There is NO warranty; not even for
       MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.