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.