[Trisquel-users] Re : Erasing Harddrive.

[lcerf]

'shred' is the best solution. It writes random data instead of zeros. By only  
writing zeros (as in 'cat /dev/zero > /dev/sda'), expensive equipments can  
still recover some data (because writing a zero on top of a zero leads to a  
"magnetic state" that is closer to zero than writing zero on top of a one).