I know there have been several questions on this, and even those marked as duplicates, however I have tried all the suggestions in those and it doesn't work, and I am not able to comment there, and so, sorry, but I'm starting my own question.
I'm trying to upgrade from a 32-bit Ubuntu 10.10 (no GUI) running the latest 64-bit Linux kernel to a 64-bit 14.04 LTS - or even 12.04 LTS.
I tried the advice in How to install software or upgrade from an old unsupported release?, namely, run the following commands:
sudo sed -i -e 's/archive.ubuntu.com\|security.ubuntu.com/old-releases.ubuntu.com/g'
sudo apt-get update sudo apt-get install update-manager-core sudo do-release-upgrade
But at the the end it never finds do-release upgrade:
bash: do-release-upgrade: command not found
I wonder if anybody might have any suggestions for me. Maybe I can't do an in-place upgrade after all?