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2020-09-21 01:03:17 -0500 marked best answer Unmet dependencies when installing Melodic on Ubuntu 18.04

When running: sudo apt install ros-melodic-desktop-full

I get the following error:

The following packages have unmet dependencies:
 ros-melodic-desktop-full : Depends: ros-melodic-desktop but it is not going to be installed
                            Depends: ros-melodic-perception but it is not going to be installed
                            Depends: ros-melodic-simulators but it is not going to be installed
                            Depends: ros-melodic-urdf-sim-tutorial but it is not going to be installed
E: Unable to correct problems, you have held broken packages.

I have followed the instructions here: http://wiki.ros.org/melodic/Installation/Ubuntu

I am running Ubuntu 18.04

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2018-08-01 10:36:29 -0500 commented question Unmet dependencies when installing Melodic on Ubuntu 18.04

I accidentally put the wrong command in my question. I have now updated it.

2018-08-01 10:35:57 -0500 edited question Unmet dependencies when installing Melodic on Ubuntu 18.04

Unmet dependencies when installing Melodic on Ubuntu 18.04 When running: sudo apt install ros-melodic-desktop-full I ge

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2018-08-01 02:26:32 -0500 asked a question Unmet dependencies when installing Melodic on Ubuntu 18.04

Unmet dependencies when installing Melodic on Ubuntu 18.04 When running: sudo rm /var/cache/apt/archives/lock I get the

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