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

Connecting to a wireless network

An Ethernet connection is simple to configure, since it is connected through wired cables with no special requirements like authentication. However, wireless LAN may require authentication like a secret key as well as ESSID of the wireless network to connect. ESSID , or Extended Service Set Identification, is the name of the network. Let's see how to connect to a wireless network by writing a shell script.

Getting ready

To connect to a wired network, we need to assign an IP address and subnet mask by using the ifconfig utility. But for a wireless network connection, it will require additional utilities such as iwconfig and iwlist to configure more parameters.

How to do it...

Let's write a script for connecting to a wireless LAN with WEP (Wired Equivalent Privacy):

#Description: Connect to Wireless LAN

#Modify the parameters below according to your settings
######### PARAMETERS ###########