https://wiki.ubuntu.com/Releases

???
https://linuxways.net/ubuntu/how-to-upgrade-from-ubuntu-22-04-to-ubuntu-23-04/
https://www.omgubuntu.co.uk/2023/04/upgrade-to-ubuntu-23-04

2023
https://9to5linux.com/you-can-now-upgrade-from-ubuntu-23-04-to-ubuntu-23-10-heres-how
https://sypalo.com/how-to-upgrade-ubuntu
    to 23.10
SergeySypalo - How to upgrade Ubuntu to 23.10 using GUI or command line 0:00 of 28:43
    https://www.youtube.com/watch?v=x-3U3omNbXM
        https://sypalo.com/how-to-upgrade-ubuntu
        ??? need linux kernel archive site from here !!!
https://jumpcloud.com/blog/how-to-upgrade-ubuntu-22-04-to-ubuntu-23-04
https://linuxconfig.org/how-to-upgrade-ubuntu-to-21-04

sudo sed -i 's/jammy/lunar/g' /etc/apt/sources.list
sudo sed -i 's/lunar/mantic/g' /etc/apt/sources.list
    !!! use appropriate code names
sudo apt update
sudo apt upgrade
sudo apt dist-upgrade
sudo do-release-upgrade
    Checking for a new Ubuntu release
    There is no development version of an LTS available.
    To upgrade to the latest non-LTS development release 
    set Prompt=normal in /etc/update-manager/release-upgrades
    sudo sed -i 's/lts/normal/g' /etc/update-manager/release-upgrades

sudo do-release-upgrade -c

lsb_release -a