Git

Setting up drupal environment in AWS

sudo cp default.services.yml services.yml

copying default.service.yml and renaming it to services.yml

services.yml provides configuration for drupal. by default twig doesn't allow comments so by entering and setting

debug:true 

this will allow us to do so

Sub Theme

this command moves the directory from one location to another

sudo mv russell ~/apps/drupal/htdocs/themes/custom/