Trouble installing ROS on Ubuntu 20.04
On a machine running a just installed Ubuntu 20.04.5 OS, I'm trying to install some packages, specifically the ROS framework.
The process fails in step 1.4 of such (taken from the ROS install guide): enter image description here
after running the sudo apt install ros-noetic-desktop-full
I get the following output:
ros-noetic-desktop-full : Depends: ros-noetic-desktop but it is not going to be installed
Depends: ros-noetic-perception but it is not going to be installed
Depends: ros-noetic-simulators but it is not going to be installed
Depends: ros-noetic-urdf-sim-tutorial but it is not going to be installed
E: Unable to correct problems, you have held broken packages.
I should say that the first time I did this, I set the package server for software download to 'main server' instead of the regional server automatically assigned and set the update request to 'Never', and got the message
error while refreshing cache ubuntu pk-client-error-quark
I have tried fixing the broken dependencies with the apt commands, I've google the problem and the terminal output but haven't been able to solve the problem.
I ran into this problem in two different machines, and when tried to replicate in a VM with 'Boxes' inside my dev-machine I didn't face the same issue.
I should also add that I am not a Linux expert by any means, and that I might have done or do something that's beyond me yet. However, any suggestions/explanations are highly welcomed.
best regards