Linux Capable published a tutorial about installing KiCad on Ubuntu 22.04 LTS.
How to Install KiCad on Ubuntu 22.04 LTS
Commands and step-by-step instructions on how to install KiCad on Ubuntu 22.04 LTS Jammy Jellyfish using the official PPA for the stable or nightly release.
How to Install KiCad on Ubuntu 22.04 LTS - LinuxCapable