My system is encrypted using Full Disk Encryption, i.e. everything except /boot is encrypted using dmcrypt/luks. I am concerned about [Cold Boot Attacks](https://en.wikipedia.org/wiki/Cold_boot_attack).

Prior work:

* <https://tails.boum.org/contribute/design/memory_erasure/>
* <http://tails.boum.org/forum/Ram_Wipe_Script/>
* <http://dee.su/liberte-security>
* <http://forum.dee.su/topic/stand-alone-implementation-of-your-ram-wipe-scripts>

Can you please provide instructions on how to wipe the RAM once Ubuntu is shutdown/restarted?

Thanks for your efforts!