Introduction to Unix

5. BASH (Bourne Again Shell)

In Linux for Programmers and Users Chapter 6, we continue the study of the shell and shell script programming, but we focus on aspect of the BASH shell that differ from other shells. Many of commands presented here are commands that are built into the shell.

Contents

• 5.1. BASH Shell Startup
• 5.2. set
• 5.3. Accessing Variables
• 5.4. Environment Variables
• 5.5. PS1
• 5.6. alias
• 5.7. Auto Completion
• 5.8. history
  • 5.8.1. fc
  • 5.8.2. Command Line Editing
• 5.9. Math in Shell Scripts
  • 5.9.1. declare
  • 5.9.2. expr
  • 5.9.3. let
  • 5.9.4. BASH Arithmetic
  • 5.9.5. bc
  • 5.9.6. Numeric Boolean expressions
• 5.10. test
• 5.11. read
• 5.12. Control Constructs
  • 5.12.1. if
  • 5.12.2. case
  • 5.12.3. for loop
  • 5.12.4. while loop
  • 5.12.5. until loop