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Make sure the file contents can't be retrieved if anyone gets ahold of your physical hard drive.
With hard drive partition:
gpg --default-recipient-self -o /path/to/encrypted_backup.gpg -e /dev/sdb1 && shred -z /dev/sdb1
WARNING/disclaimer: Be sure you... F&%k it--just don't try this.
There are 2 alternatives - vote for the best!
If you can do better, submit your command here.
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