sudo apt update
sudo apt install software-properties-common apt-transport-https wget #Ignore this command if you have already installed this package
wget -q https://packagecloud.io/AtomEditor/atom/gpgkey -O- | sudo apt-key add -
sudo add-apt-repository "deb [arch=amd64] https://packagecloud.io/AtomEditor/atom/any/ any main"
sudo apt install atom