Book Image

Linux Command Line and Shell Scripting Bible - Third Edition

By : Richard Blum, Christine Bresnahan
Book Image

Linux Command Line and Shell Scripting Bible - Third Edition

By: Richard Blum, Christine Bresnahan

Overview of this book

The Linux command line enables you to type specific shell commands directly into the system to manipulate files and query system resources. Command line statements can be combined into short programs called shell scripts, a practice increasing in popularity due to its usefulness in automation. Linux is a robust system with tremendous potential, and Linux Command Line and Shell Scripting Bible opens the door to new possibilities. Linux Command Line and Shell Scripting Bible is your essential Linux guide. It contains new functional examples that are fully updated to align with the latest Linux features. Beginning with command line fundamentals, the book moves into shell scripting and shows you the practical application of commands in automating frequently performed functions. This book is a complete guide providing detailed instruction and expert advice working within this aspect of Linux. Whether used as a tutorial or as a quick reference, this book contains information that every Linux user should know.
Table of Contents (34 chapters)
Part I: The Linux Command Line
Part II: Shell Scripting Basics
Part III: Advanced Shell Scripting
Part IV: Creating Practical Scripts
End User License Agreement

Generating an Excuse

You've been there. That endless staff meeting that is full of unimportant information. You would really rather be working on that fascinating bash shell script project back at your desk. Here's a little fun script you can use to get out of the next staff meeting.

Short Message Service (SMS) allows text messages to be sent between cell phones. However, you can also use SMS to send text messages directly from e-mail or the command line. The script in this section allows you to construct a text message to be sent at a specified time directly to your phone. Receiving a “critical” message from your Linux system is the perfect excuse for leaving a staff meeting early.

Understanding the required functions

You can send an SMS message from the command line in several ways. One way is via your system's e-mail using your phone carrier's SMS service. Another way is using the curl utility.

Learning about curl

Similar to wget, the curl utility...