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Red Hat Enterprise Linux 9 Essentials Book now available.

Purchase a copy of Red Hat Enterprise Linux 9 (RHEL 9) Essentials

Red Hat Enterprise Linux 9 Essentials Print and eBook (PDF) editions contain 34 chapters and 298 pages

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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

These 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

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