The latest version for Linux is Atom 0.97.0, which is still a beta version and works only on 64 bit (amd64) systems.
In this article I will show you how to install Atom 0.97.0 on Ubuntu 14.04 Trusty Tahr, Ubuntu 13.10 Quantal Quetzal, Ubuntu 12.04 Precise Pangolin, Linux Mint 17 Qiana, Linux Mint 16 Petra, Linux Mint 13 Maya, Pinguy OS 14.04, Pinguy OS 12.04, Elementary OS 03 Isis and Elementary OS 0.2 Luna, (only on 64 bit systems).
Because it is available via PPA, installin Atom 0.97.0 on the listed Ubuntu, Linux Mint, Pinguy OS and Elementary OS systems is easy. All you have to do is add the ppa to your system, update the local repository index and install the atom package. Like this:
$ sudo add-apt-repository ppa:webupd8team/atom
$ sudo apt-get update
$ sudo apt-get install atom
If it crashes on the first start, start it manually, from the terminal:
Optional, to remove atom, do:
$ sudo apt-get remove atom