How to open a new file in a another tab instead of a new window in Atom editor?

I have already an atom editor window open in my Linux and I try running the atom from the terminal to open another file:

atom /path/to/new_file.txt 

Every time atom tries to open a new window, when opening a new file instead of opening a new tab in the currently open atom editor. Is there is a way to tell atom (via a config or something) not open a new window if there is an atom window already open?