Follow a guide for whatever Operating System you are using. You do NOT need to install Git, unless you you will be developing the code yourself. * After you have installed PHP you should [install Composer] (https://getcomposer.org/doc/00-intro.md#downloading-the-composer-executable). We recommend the global method, as we do not provide the composer.phar file in our repo. * At the point that your chosen guide, instructs you to clone the newznab-tmux repository, you should ONLY do so if you intend to work on the code yourself. Either: 1) If you will not be working on the code (most people), you should run this command instead of cloning the repository (This will install the latest version of the stable code.): composer create-project -s dev dariusiii/newznab-tmux . or: 2) Clone the repository as instructed, then switch to the newznab-tmux directory and run: git checkout dev-branch composer install