Wipe and shutdown remote Linux server over SSH

Wiping and shutting down a headless linux server over SSH.

Wipe
Copies zeros over the whole disk.

dd if=/dev/zero of=/dev/sdaX

Where sdaX is the device you want to wipe. Read discussion at security.stackexchange.

Shutdown
Since the shutdown command will be trashed by the wiping, we need to force shutdown in another way.

echo 1 > /proc/sys/kernel/sysrq
echo o > /proc/sysrq-trigger

Don’t try this at home.