How to secure erase in Linux via terminal:
apt-get install hdparam
hdparm –user-master u –security-set-pass password123 /dev/sdX
time hdparm –user-master u –security-erase password123 /dev/sdX
Where “X” is the media.
If you just want to erase a HDD’s file system assets then:
wipefs -a /dev/sdX
Where”X” is the media.