Lubuntu 18.04 LTS upgrade to 20.04 LTS then 22.04 LTS

I have a old IBM X61 laptop which is installed Lubuntu 18.04 LTS and it is long time did not use.

I power on it and try to upgrade it, it cannot upgrade to 20.04 LTS at the first place.

 

 

After I click the "Yes, Upgrade Now", it is no respond……

 

Then, I upgrade all base software of the Lubuntu, I re-run the update again, it show all software update to date and 20.04.6 LTS available. I click "Upgrade" and it start the upgrade process.

 

 

After the upgrade complete, you will see a Lubuntu 20.04 wallpaper

 

I run the upgrade again, this time, Lubuntu 22.04.3 LTS is now available. Click "Upgrade.."

 

 

After the upgrade, it successfully and you have 22.04.3

 

Lubuntu 18.04 LTS upgrade to 20.04 LTS then 22.04 LTS