aptInstall the GPG key:wget -qO - https://download.sublimetext.com/sublimehq-pub.gpg | sudo apt-key add - Ensure apt is set up to work with https sources:sudo apt-get install apt-transport-https Select the channel to use:Stableecho "deb https://download.sublimetext.com/ apt/stable/" | sudo tee /etc/apt/sources.list.d/sublime-text.list Devecho "deb https://download.sublimetext.com/ apt/dev/" | sudo tee /etc/apt/sources.list.d/sublime-text.list Update apt sources and install Sublime Textsudo apt-g