Installing Sublime Text 2 on Linux

sudo add-apt-repository ppa:webupd8team/sublime-text-2
sudo apt-get update
sudo apt-get install sublime-text

sudo: super user do
ppa:webupd8team/sublime-text-2: adding unsupported packages with this PPA (Personal Package Archive)
apt-get: get a package from the Advance Packing Tool
update: to synchronize the package index file from the source