How to resolve “Could not find a JavaScript runtime” with Ruby on Rails App
If you tried to start Rails server and got this error:
/usr/lib/ruby/gems/1.8/gems/execjs-1.3.0/lib/execjs/runtimes.rb:50:in `autodetect': Could not find a JavaScript runtime. See https://github.com/sstephenson/execjs for a list of available runtimes. (ExecJS::RuntimeUnavailable)
In Ubuntu, you can fix it installing node.js:
sudo apt-get install python-software-properties sudo add-apt-repository ppa:chris-lea/node.js sudo apt-get update sudo apt-get install nodejs sudo apt-get install nodejs-dev
If you have other OS please look here: https://github.com/joyent/node/wiki/Installing-Node.js-via-package-manager
After you should starting Rails server with successful.
Please recommend me if this post help you: 
