Unlike other CMSs, the update of Drupal core is not difficult, but somehow complicated because of all the details involved. In this tutorial, we are going to implement a local Drupal 9 installation, and then we will upload (push) this codebase to a central repository on Bitbucket. We will then download (pull) the codebase from this repository to the live server, where the website is going to be stored.  

Using this (terminal-oriented) process, you will be able to speed up Drupal core and module updates, and you will follow best practices. 

It is assumed that you already have a LAMP stack installed on your system. Furthermore, you require terminal access on your web server.

Keep reading to learn how!