How to Securely delete files in Linux

In this video, the presenter explains how to securely delete files in Linux, specifically using a Kali Linux machine. They start by mentioning the standard 'rm' command for removing files, but note that it doesn't overwrite the files on the hard drive. Instead, they introduce the 'shred' command, which is designed to overwrite files securely. The presenter details the syntax and options for the 'shred' command, including flags for forcing the action, specifying size, and adding a final zero overwrite. They demonstrate the use of 'shred' with the '-u' and '-z' options to securely delete a file by overwriting it and then deallocating it. The video concludes with a reminder of the method for securely deleting files.