At the base of these articles there is a simple fact: a simple
rm of a file or deleting it via any file manager is not enough to really remove it from your hard disk.
If you really want to delete files from a computer you have to use more sophisticated commands, and in former articles we have seen:
Dban: Darik’s Boot and Nuke (commonly known as DBAN) is an open source project hosted on SourceForge. The program is designed to securely erase a hard disk until data is permanently removed and no longer recoverable, which is achieved by overwriting the data with random numbers generated by Mersenne twister or ISAAC (a PRNG).
Shred : Overwrites the specified FILE(s) repeatedly, in order to make it harder for even very expensive hardware probing to recover the data.
Wipe : Wipe is a secure file wiping utility.
Today we’ll take a look at the package secure-delete that contains some useful programs to delete in a safer way files, memory, free space and/or the Swap space.