I'm trying to upgrade from Ubuntu 10.04 to 18.04 LTS. How?
update-manager -d --dist-upgrade reports:
| Your system is up-to-date
|
| There are no upgrades available for your system. The upgrade will
| now be canceled.
Here's what I tried:
Follow How to install software or upgrade from an old unsupported release?
In /etc/apt/sources.list, replace all occurrences of ubuntu.media.mit.edu with old-releases.ubuntu.com.
In /var/lib/apt, mv lists lists.old; mkdir -p lists/partial
wget -q -O - https://dl-ssl.google.com/linux/linux_signing_key.pub | sudo apt-key add -
Even though dl.google.com and canonical don't occur in /etc/apt/sources.list, they are in some hidden configuration and cause trouble. Get info on finding them from How to install software or upgrade from an old unsupported release?; uncheck those two boxes.
apt-get update
apt-get upgrade
sudo update-manager -cd
sudo update-manager -d --dist-upgrade
I believe the command is
sudo do-release-upgrade
However, since the last upgradable version seems to be 14.04, you will have to use a DVD. 10.04 is not supported anymore, and therefore not upgradable. Only 14.04 on are supported; you will need a clean install
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