Install Atom Editor in Ubuntu.Atom Editor is opensource project.Atom is described as A hackable text editor for the 21st Century
How to install Atom in Ubuntu via PPA:
Webupd8 Team is maintaining an unofficial PPA with most recent Atom packages for all current Ubuntu releases, and derivatives. While official Linux binary is 64-bit only, the PPA supports both 32-bit and 64-bit.
Open terminal (Ctrl+Alt+T) and run the command:
sudo add-apt-repository ppa:webupd8team/atom