Run this to install KiCAD 6.0:
sudo add-apt-repository ppa:kicad/kicad-6.0-releases sudo apt update -y sudo apt -y install kicad
Run this to install KiCAD 6.0:
sudo add-apt-repository ppa:kicad/kicad-6.0-releases sudo apt update -y sudo apt -y install kicad
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