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

Downloading from a web page

Downloading a file or a web page from a given URL is simple. A few command-line download utilities are available to perform this task.

Getting ready

wget is a file download command-line utility. It is very flexible and can be configured with many options.

How to do it...

A web page or a remote file can be downloaded by using wget, as follows:

$ wget URL

For example:

$ wget 
--2010-08-01 07:51:20-- 
Connecting to||:80... connected. 
HTTP request sent, awaiting response... 200 OK 
Length: 15280 (15K) [text/html] 
Saving to: "index.html" 

100%[======================================>] 15,280      75.3K/s   in 0.2s    

2010-08-01 07:51:21 (75.3 KB/s) - "index.html" saved [15280/15280]

It is also possible to specify multiple download URLs, as follows:

$ wget URL1 URL2 URL3 ..

How it works...

Usually, files are downloaded with the same filename as in the URL, and the...