shred command: makes files unrecoverable in Linux

Linux Tux

Are you still removing your files containing sensitive information (ssh keys, an account password, auth file, etc) using the standard way?

Then you are making it easier for third-party applications to recover. Let’s dig in more; every time you delete files the standard way, they just get unlinked from the filesystem, making the block free for overwriting.

Read Article At linuxtoday.com