How to open Atom editor from command line in OS X?

Question

I have the Atom editor and was wondering how you can open a file or folder from the terminal in Atom. I am using a Mac. I am looking for a way to do this:

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Answer 1

I had problems due to atom being unable to write its logfile when starting from the commandline. This cured it.

sudo chmod 777 ~/.atom/nohup.out