Bash Cookbook

How to do it...

Let's get started:

1. Open a terminal, and an editor of your choice to create a new script.
2. Inside of your script, add the following:

#!/bin/bashSTR1='123 is a number, ABC is alphabetic & aBC123 is alphanumeric.'echo "-------------------------------------------------"# Want to find all of the files beginning with an uppercase character and end with .pdf?ls * | grep [[:upper:]]*.pdfecho "-------------------------------------------------"# Just all of the directories in your current directory?ls -l [[:upper:]]*echo "-------------------------------------------------"# How about all of the files we created with an expansion using the { } brackets?ls [:lower:].test .echo "-------------------------------------------------"# Files ...