Windows - Open the Start Menu and look for an icon that says "Node.js Command Prompt". Type node in the terminal and press Enter. If a weird greater symbol (>) appeared in your terminal with a blinking underscore, then you're able to run Node.
Linux/OSX - Open a terminal and type node. If a weird greater symbol (>) appeared in your terminal with a blinking underscore, then you're able to run Node.
Windows - Open the Start Menu and look for an icon that says "Node.js Command Prompt". Once you open it, you could for example type npm install javascripting -g to install Javascripting. If you want to install other workshopper, use the same command replacing the module name.
Linux/OSX - Open a terminal and type npm install javascripting -g to install Javascripting. If you want to install other workshopper, use the same command replacing the module name.
I installed Node.js but when I type node in my terminal it says 'node' is not recognized (or node: command not found)
It's likely that you have a problem with your installation. Go through the installation steps again and if you still have the problem, open an issue telling us exactly which steps you followed to install Node.
If you know that Node installed correctly, then you may have a problem with the installation of the workshopper. Try to reinstall the workshopper. After that, if you still have the problem open an issue with your error and tell us exactly what happened.
Don't panic. Open an issue, give us your code, the workshopper name, the challenge name and be patient. Someone will try to help you soon.
All the workshoppers are Open Source. If you know how to fix it, just submit a pull request to the workshopper's repository explaining the problem. If you don't know how to fix it, open an issue with the title Improvement - Workshopper name, challenge name and all the aditional info you consider it's neccessary in it's content.