How to Install Sublime Text 3 on Ubuntu 18.04 LTS?br br First, Right click on the desktop, and then click on 'open terminal.'br br br Step 1: Install the GPG keybr br wget -qO - | sudo apt-key add -br br Ensure apt is set up to work with https sources: br br sudo apt-get install apt-transport-httpsbr br br Step 2: Add the Sublime text apt PPA using the command below:-br br echo "deb aptstable" | sudo tee etcaptsources.list.dsublime-text.