# Install and run mods You need to first install [node.js](https://docs.npmjs.com/getting-started/installing-node). Install the [http-server](https://www.npmjs.com/package/http-server) npm package. Including '-g' sets the installs the package gloabally, allowing you to use it as a command line tool: <code>npm install http-server -g</code> Clone the mods repository: <code>git clone ssh://git@gitlab.cba.mit.edu:846/pub/mods.git</code> Use the command line to navigate to the root of the mods repository: <code>cd mods</code> Start up a server: <code>http-server</code> Open a browser tab and go to <code>127.0.0.1:8080</code> which is the same as <code>http://localhost:8080</code> to view the server that you just started. Depending on how to need to use mods you can start local servers located in <code>mods/js</code>, for example, if you start from the root of the mods repository: <code>cd js</code> <code>node printserver.js</code> # Mods Connection Debugging set correct serial port permission (do this each time you reboot the machine): <code>chmod a+rwx /dev/ttyUSB0</code> start serialserver in the terminal so you can see the logs as it tries to connect. navigate to the mods/js folder in the terminal (probably use <code>cd ~/mods/js</code>) and type: <code>node serialserver.js ::ffff:127.0.0.1 1234</code> check serialserver is running with: <code>ps aux | grep node</code>