I was trying to update my Ubuntu distro from 20 to 21, and it wasn’t happy.
/etc/update-manager/release-upgrades and attempting to run the upgrade:
Checking for a new Ubuntu release Please install all available updates for your release before upgrading.
It turns out that this benign message was the reason:
❯ sudo apt dist-upgrade Reading package lists... Done Building dependency tree Reading state information... Done Calculating upgrade... Done The following packages have been kept back: libc++1 0 to upgrade, 0 to newly install, 0 to remove and 1 not to upgrade.
This fixes it:
sudo apt-get install -y libc++1
sudo apt-get update && sudo apt-get dist-upgrade
sudo do-release-upgrade -m desktop