Horizon is built on top of RethinkDB, so a RethinkDB server is mandatory before using Horizon. You will also need to install the latest Node.js and NPM (node package manager).
Download and install Node.js from here https://nodejs.org/en/download/.
To install Horizon, run the following command in the terminal:
sudo npm install -g horizon
This will install Horizon as a global node module package. You should be seeing a similar screen as shown here:
Once the installation is complete, you can access Horizon from the terminal using the
To create a new Horizon project, the CLI provides the
hz init command. ...