Atom is one of the best text editing software that's used by many web developer, it's created by github and available as free open source software.
But so far (2016) atom is not yet available on the main repository of ubuntu, but don't worry, we still able to install it through PPA repo.
Step by step how to install atom text editor on ubuntu
- add ppa repository for atom
- run the apt-get update command
- install atom
- enjoy it!
Remember that you can run atom from command line, simply type 'atom' on the command line, or if you are editing files under root directory then use 'sudo atom' to give you root permission.