Bash
Linux
Unix
Reading User Input
Via command line arguments and prompting users for input
Bash Case Statement
A popular alternative to the if-then-else statement
How to Make Grep Case Insensitive
By default, grep is case sensitive
Vim
Vi
Undo & Redo in Vim / Vi
Keyboard shortcuts and summary of how Vim tracks changes
Copy & Paste in Vim / Vi
Copy (Yank), Paste (Put) and Cut (Delete) in Vim
