The shred command overwrites the contents of files in a way that makes it very difficult to recover them.
When you delete a file or delete it from the trash, from Linux or any other operating system, it is not completely erased from the hard drive.
shred --help
shred --version
shred a.txt
shred -n 10 b.txt
shred -n 10 -vz e.txt
shred -u c.txt
shred -uv d.txt
shred -s 10 f.txt
shred -v f.txt
shred -f g.txt
shred -z h.txt
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