Contents

1. Writing your first and getting it to work
   1. Writing a
   2. Setting permissions
   3. Putting it in your path
2. Editing the s you already have
   1. Commands, commands, everywhere
   2. Aliases
   3. Shell functions
   4. type
   5. .bashrc
3. Here s
   1. Writing an HTML file with a
4. Substitutions - Part 1
   1. Variables
   2. How to create a variable
   3. Where does the variable"s name come from?
   4. How does this increase our laziness?
   5. Environment Variables
5. Substitutions - Part 2
   1. --help and other tricks
   2. Assigning a command"s result to a variable
   3. Constants
6. Quoting
   1. Single and double quotes
   2. Quoting a single character
   3. Other backslash tricks
7. Shell Functions
   1. Keep your s working