How could I do an executable file in ROS?

edit

I'm really interested in the way your bash works. I'll really appreciate if you can give me more information about it. Thank you so much.

Sure :) as I said, I want the .launch file to be launched with the boot of the robot, so in my .bashrc file I have this piece of code:

 TERMINAL = `tty`
 case $TERMINAL in
           "/dev/tty2") roslaunch YOURFILE.launch;
           sleep 2;;
 esac

As you can see, I look for the 'tty2' terminal, and then I launch my file. You can do it with any terminal, or If you just want to launch the file in any moment with the script, you don't need to look for a specific terminal, remember that I'm doing that way because I don't want to interact with it.

I'm running multiple launch files at the startup, and I need to be able to locate in which terminal are each one of them. That's why I'm using the tty "hack", to identify where they're running.

That is really useful for me, thank you very much.