[Linux Mint 17.2] Install latest Atom

If you have previously installed Atom from another source, backup your atom directory, then remove atom package

$ cp -R ~/.atom ~/.atom_bak
$ [sudo] apt-get remove atom

Then install the latest version using the webupd8team PPA

$ [sudo] add-apt-repository ppa:webupd8team/atom && \
> [sudo] apt-get update && \
> [sudo] apt-get install atom