Bash
Windows Power Shell
Windows Server Active Directory
Lynda.com
Learning ZSH
Learning Bash Scripting
Getting started with bash programming
Learning Linux Command Line
Linux Bash shell and scripts
Learning Linux Shell Scripting
Learn Jenkins
https://www.codecademy.com/learn/learn-the-command-line
https://www.learnenough.com/command-line-tutorial
http://write.flossmanuals.net/command-line/