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

The Debian-Based Systems

The dpkg command is at the core of the Debian-based family of PMS tools. These other tools are included in this PMS:

  • apt-get
  • apt-cache
  • aptitude

By far the most common command line tool is aptitude, and for good reason. The aptitude tool is essentially a front-end for both the apt tools and dpkg. Whereas dpkg is a PMS tool, aptitude is a complete Package Management System.

Using the aptitude command at the command line helps you avoid common software installation problems, such as missing software dependencies, unstable system environments, and just a whole lot of unnecessary hassle. This section looks at how to use the aptitude command tool from the Linux command line.

Managing packages with aptitude

A common task faced by Linux system administrators is to determine what packages are already installed on the system. Fortunately, aptitude has a handy interactive interface that makes this task an easy one.

If you have aptitude installed in your Linux distribution...