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

Finding symbolic links and their targets

Symbolic links are very common in Unix-like systems. There are various reasons you want to use them, ranging from convenient access to maintaining different versions of the same library or program. This recipe will discuss the basic techniques of handling symbolic links.

Symbolic links are just pointers to other files, they are similar in function to aliases in Mac OS X or shortcuts in Windows. When symbolic links are removed, they will not cause any harm to the original file.

How to do it...

The following steps will help you handle symbolic links:

  1. We can create a symbolic link as follows:

    $ ln -s target symbolic_link_name

    For example:

    $ ln -l -s /var/www/ ~/web

    This creates a symbolic link (called web) in the current user's home directory, which points to /var/www/.

  2. To verify that the link was created, run the following command:

    $ ls -l web
    lrwxrwxrwx 1 slynux slynux 8 2010-06-25 21:34 web -> /var/www

    web -> /var/www specifies that web points to...