linux_drive_clearing.bash

#show mounted drives
df -h

#overwrite drive with zeros
sudo dd if=/dev/zero of=/dev/xxx bs=1M

#regulary show state of last dd-command
watch -n5 'sudo kill -USR1 $(pgrep ^dd)'


#show unmounted drives
fdisk -l

# mount partition
mkfs -t vfat /dev/xxx
# mount full drive without partitions
mkfs.vfat -I /dev/xxx


#wipe free space:
#@link http://superuser.com/questions/19326/how-to-wipe-free-disk-space-in-linux
sudo apt-get install secure-delete
sfill -v .