zerofill man page on DragonFly
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zerofill(1) GNU Telephony zerofill(1)
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, zero‐
fill 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.
GNU uCommon January 2010 zerofill(1)
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