Book Image

Linux Shell Scripting Cookbook, Second Edition - Second Edition

Book Image

Linux Shell Scripting Cookbook, Second Edition - Second Edition

Overview of this book

The shell remains one of the most powerful tools on a computer system — yet a large number of users are unaware of how much one can accomplish with it. Using a combination of simple commands, we will see how to solve complex problems in day to day computer usage.Linux Shell Scripting Cookbook, Second Edition will take you through useful real-world recipes designed to make your daily life easy when working with the shell. The book shows the reader how to effectively use the shell to accomplish complex tasks with ease.The book discusses basics of using the shell, general commands and proceeds to show the reader how to use them to perform complex tasks with ease.Starting with the basics of the shell, we will learn simple commands with their usages allowing us to perform operations on files of different kind. The book then proceeds to explain text processing, web interaction and concludes with backups, monitoring and other sysadmin tasks.Linux Shell Scripting Cookbook, Second Edition serves as an excellent guide to solving day to day problems using the shell and few powerful commands together to create solutions.
Table of Contents (16 chapters)
Linux Shell Scripting Cookbook
About the Authors
About the Reviewers

Faster archiving with pbzip2

Most modern computers today are equipped with at least two CPU cores - for the user it means almost the same as two real CPUs doing your work. However, just having a multicore CPU doesn't mean your programs will run faster, it is important that the programs themselves have been designed to run faster on multicore processors.

Most of the compression commands that we saw up to now will use only one CPU and, hence, won't be very fast. pbzip2 can use multiple cores, hence decreasing overall time taken to compress your files.

Getting ready

pbzip2 usually doesn't come preinstalled with most distros, you will have to use your package manager to install it.

How to do it...

Let's see how to use pbzip2 to compress files and extract them:

  1. Compress a single file like this:

    pbzip2 myfile.tar

    pbzip2 will automatically detect the number of cores on your system and compress myfile.tar, to myfile.tar.bz2

  2. To compress and archive multiple files or directories, we use pbzip2 in combination...