So that it’s documented… I’m using port 8080 as the default port as the likelyhood of your upstream proxy being on 8080 is high – else, typical proxy ports are, of course, 80, ...
In the story relating to release upgrades for Ubuntu, below the end-of-life table for the Ubutu Releases from the Ubuntu Wiki – just to have it all in one place; I’m only including the LTS ...
What release / version are you running? cat /etc/lsb-release or cat /etc/issue But you knew that already — to upgrade the version of the Ubuntu installation you have is quite simple – just ...