System encryption on Debian Etch
In this article I will describe how to setup a nearly complete encrypted system using Debian Etch and cryptsetup with LUKS. The goal is: encrypt all partitions except /boot. The user should enter a password at boot time or provide a keyfile on an USB device to decrypt the root partition. Keyfiles for additional partitions are located on the root, so the user does not need to enter a password for every partition.
I will describe the necessary steps of the encryption based on a new minimal installation of Debian Etch, though you may also encrypt a working system.
Some more things before we start...
What you will need during the process:
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