Securely Delete Files in Linux
It used to be that only paranoids cared a whit about shredding their data—or their office paperwork, for that matter. But these days, there really are people out there just waiting for you to slip up and expose your private data. Fortunately, if you're running Linux, deleting sensitive information is fast and easy with the 'shred' utility.
Shred is a simple command line utility that's included with many Linux distributions, and it repeatedly overwrites a file with garbage data to render the file unrecoverable. Used in its simplest form (simply 'shred '), it will overwrite the file 25 times to obscure everything in it, and leave the file on your drive. But with the addition of command arguments, Shred becomes much more powerful and effective.
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