I'm trying to upgrade my Ubuntu from 16.04 to 18.04, while doing
sudo apt update
&
sudo apt upgrade
and keep getting
The following packages have been kept back: GCC-6-base
I tried to install, upgrade and remove this package but keep getting
The following packages have unmet dependencies: libgail-common: Depends: libgail18 (= 2.24.30-1ubuntu1.16.04.2) but it is not going to be installed libgcc1: Depends: GCC-6-base (= 6.0.1-0ubuntu1) but 6.3.0-21ubuntu1~16.04.york0 is to be installed libwxgtk3.0-0v5: Depends: libgl1-mesa-glx but it is not going to be installed or libgl1 Depends: libgtk2.0-0 (>= 2.24.0) but it is not going to be installed E: Error, pkgProblemResolver:: Resolve generated breaks, this may be caused by held packages.