Update linux.md to accomadate build issues

I ran into this when I installed today, and the inscribed method allowed me to complete my atom install on CrunchBang. I've seen a few issues having to do with this, so it might be advisable to have it in the troubleshooting section!
Fixed typo's for proposed commit.
Merge pull request #2713 from Theswweet/patch-1

Update linux.md to accomadate build issues