First install some necessary tools:
sudo apt-get update** **sudo apt-get install lsb-release wget gnupg
Then install Gazebo Garden:
sudo wget https://packages.osrfoundation.org/gazebo.gpg -O /usr/share/keyrings/pkgs-osrf-archive-keyring.gpg** **echo "deb [arch=$(dpkg --print-architecture) signed-by=/usr/share/keyrings/pkgs-osrf-archive-keyring.gpg] http://packages.osrfoundation.org/gazebo/ubuntu-stable $(lsb_release -cs) main" | sudo tee /etc/apt/sources.list.d/gazebo-stable.list > /dev/null** **sudo apt-get update** **sudo apt-get install gz-garden
When I type this command “sudo apt-get update”, it told me that the following signature could not be verified because there was no public key: NO_PUBKEY 67170598AF249743
The question lingered all night,help me,please!!!