Here are some quick instructions to install Etherpad Lite on a MoodleBox. This is given absolutely without any support: you're on your own on this one, be warned!

Create a database for your Etherpad Lite instance on the MoodleBox. You can do this easily by visiting http://moodlebox.home/adminer.php (see: https://moodlebox.net/en/help/access-to-the-database-management-interface/) and clicking Create database. A good database name would be etherpad-lite. Choose utf8mb4_general_ci as the database collation
Access to the MoodleBox via SSH (see: https://moodlebox.net/en/help/command-line-connection/)
Update the MoodleBox software: sudo apt-get update && sudo apt-get dist-upgrade
Install nodejs and npm: sudo apt-get install -y nodejs npm
Change the working directory to /opt: cd /opt
Download Etherpad Lite, using git: sudo git clone --branch master git://github.com/ether/etherpad-lite.git
Change group and set adequate permissions of etherpad-lite folder: sudo chgrp -R moodlebox etherpad-lite/, then sudo chmod -R g+w etherpad-lite/
Change the working directory to /opt/etherpad-lite: cd /opt/etherpad-lite
Create the settings file using the template: sudo cp settings.json.template settings.json.
Edit settings.json, to set the connection to the database. Careful! Don't mess with the file, or you'll have to do step 9 and next steps again. Locate the database section, around line 132, and delete or comment out lines with dirty database type (4 lines), then uncomment the section with mysql database type. Edit then the section so that it looks like this (you should set the password to what your main password actually is, if you changed it):
```
 "dbType" : "mysql",
 "dbSettings" : {
   "user":     "moodlebox",
   "host":     "localhost",
   "port":     3306,
   "password": "Moodlebox4$",
   "database": "etherpad-lite",
   "charset":  "utf8mb4"
 },
```
(optional) If you want your Etherpad Lite installation looks pretty, replace no-skin with colibris in the same file, around line 83
Manually launch Etherpad Lite for its first launch: bin/run.sh; this will take about 20-30 seconds
Install a service file to get Etherpad Lite automatically launch at every MoodleBox boot. Copy the following lines to a new etherpad-lite.service into /etc/systemd/system/: sudo nano /etc/systemd/system/etherpad-lite.service, then copy these lines
```
[Unit]
Description=Etherpad-lite, the collaborative editor.
After=syslog.target network.target

[Service]
Type=simple
User=root
Group=root
WorkingDirectory=/opt/etherpad-lite
Environment=NODE_ENV=production
ExecStart=/usr/bin/nodejs /opt/etherpad-lite/node_modules/ep_etherpad-lite/node/server.js
Restart=always

[Install]
WantedBy=multi-user.target
```
1. Save, then enable the service file: sudo systemctl enable etherpad-lite and launch it: sudo systemctl start etherpad-lite.
2. With your browser, access the URL: http://moodlebox.home:9001 and enjoy!