LXer: Using "shred" to Securely Delete Files
 

Published at LXer:

When you use the "rm" utility, you may think that you're deleting a file, but you're not. All you're doing is removing the file's index--or, inode number--from the hard drive. The file is still there, and can still be recovered, as long as you don't overwrite the space that it occupies with another file.

Read More...