### JOHLEM.net ###

--- CHEATSHEET WIPE DISK 

#List existing partitions, mount points and disk capacity.
sudo lsblk

#Wipe Storage Device with DD
sudo dd if=/dev/urandom of=/dev/sdb1 bs=1M


#Wipe storage device and print progress periodically.
sudo dd if=/dev/urandom of=/dev/sdb1 bs=1M status=progress

#Wipe Master Boot Record (MBR)
dd if=/dev/zero of=/dev/hdX bs=446 count=1

#You can wipe a partition using the same method than for the whole disk.
dd if=/dev/urandom of=/dev/sdX3 bs=1M

==

--- CHEATSHEET WIPE HD

How to Wipe Hard Drive Clean Using dd Command in Linux

Wipe Entire Disk = Filling the disk with all zeros:
# dd if=/dev/zero of=/dev/sdX bs=1M 
(Filling the disk with all zeros)


for security, you should populate it with random data rather than zeros:
# dd if=/dev/urandom of=/dev/sdX bs=1M *replace X with the target drive letter.


Wipe Master Boot Record (MBR):
dd if=/dev/zero of=/dev/hdX bs=446 count=1

Wipe Partitions:
# dd if=/dev/zero of=/dev/sdX2 bs=1M
or
# dd if=/dev/urandom of=/dev/sdX3 bs=1M  (secure)