instruction on Mission Planners GitHub page is a little bit outdated for newer Ubuntu (in this case 20.04)
in newer Ubuntu ‘libmono-winforms2.0-cil’ and ‘libmono-corlib2.0-cil’ replaced by ‘libmono-system-windows-forms4.0-cil’
to install mission planner on Ubuntu 20.04 :
first install dependecies by executing :
sudo apt install mono-runtime libmono-system-windows-forms4.0-cil libmono-system-core4.0-cil libmono-system-management4.0-cil libmono-system-xml-linq4.0-cil
then
sudo apt install mono-complete
Get the lastest zipped version of Mission Planner here : https://firmware.ardupilot.org/Tools/MissionPlanner/MissionPlanner-latest.zip
Unzip in the directory you want
Go into the directory
run with mono MissionPlanner.exe