My work requires us to have full-disk encryption, so these are the steps I use.
The basic idea is to create a LUKS-encrypted partition which is used as an LVM Physical Volume.
The GRUB boot partition isn't encrypted, but everything else is.
These steps tested and working on 22.04 (jammy) and 20.04 (focal).
| # To install on Arch-based distros(like Manjaro) | |
| # sudo pacman -Syu xdotool | |
| # To install on Ubuntu-based distros | |
| # sudo apt-get install xdotool | |
| xdotool key Caps_Lock | |
| # Especially useful in VM scenarios where the parent OS has disabled Caps Lock, | |
| # but somehow the child OS thinks that caps is active. |