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thats what I did previously to get rid of one old ksh script.
Very useful and very dangerous!
When I was a Linux instructor, I would run this on systems to wipe the hard drive at the end of the week (don't run this, unless you want to hose your data):
yes "Aaron was here on $(date +D). " | sudo dd of=/dev/sda bs-4096Then, when the next instructor came to the training center and installed his system, if he wanted, he could look at the bits afterwards, and see my digital graffiti:
sudo xxd /dev/sda | headFun times!
bs=4096, that is. 'twould be nice if you could edit your comment.