This is the command zerofill that can be run in the OnWorks free hosting provider using one of our multiple free online workstations such as Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator
PROGRAM:
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.
Use zerofill online using onworks.net services