Be aware that Atom 1.12.2 on Linux has issues regarding launch shell env resulting in rogue process that eats 100% cpu core. Until this issue is fixed please be careful if you plan to launch atom from command line.
The workaround is to launch Atom detaching it from terminal and shell:
$ atom &. It’s dirty (Atom already detaches from shell later) but it works.
Update: Atom 1.12.3 has this issue fixed but it is not yet available from webupd8 PPA.
Thanks a lot for the info!