C.5. Common Post-Installation Tasks

The following sections are about common post-installation tasks.

C.5.1. Set a Randomly Generated Key as an Additional Way to Access an Encrypted Block Device

The following sections are about generating keys and adding keys.

C.5.1.1. Generate a Key

This will generate a 256-bit key in the file $HOME/keyfile.
dd if=/dev/urandom of=$HOME/keyfile bs=32 count=1
chmod 600 $HOME/keyfile

C.5.1.2. Add the Key to an Available Keyslot on the Encrypted Device

cryptsetup luksAddKey <device> ~/keyfile