These are some common actions and notes that I use when working on my Drupal 8 installation.
CSS Grid is a grid system that allows you to fill the grid with contents or assign content to a certain cell.
There will not be much here on bash because there is a really good resource at ryanstutorials.net.
The site seems ad free and a good place to lookup everyting about Bash.: https://ryanstutorials.net/bash-scripting-tutorial/
Most of my maintenance will be done from the command line. These are some lines from a recent setup.
Setting up an Ubuntu server with a standard Apache/MySQL/Php stack. These are the base commands I start with.