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Linux Shell Scripting Cookbook, Second Edition

You're reading from   Linux Shell Scripting Cookbook, Second Edition Don't neglect the shell – this book will empower you to use simple commands to perform complex tasks. Whether you're a casual or advanced Linux user, the cookbook approach makes it all so brilliantly accessible and, above all, useful.

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Product type Paperback
Published in May 2013
Publisher Packt
ISBN-13 9781782162742
Length 384 pages
Edition 2nd Edition
Tools
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Toc

Table of Contents (16) Chapters Close

Linux Shell Scripting Cookbook
Credits
About the Authors
About the Reviewers
www.PacktPub.com
Preface
1. Shell Something Out FREE CHAPTER 2. Have a Good Command 3. File In, File Out 4. Texting and Driving 5. Tangled Web? Not At All! 6. The Backup Plan 7. The Old-boy Network 8. Put on the Monitor's Cap 9. Administration Calls Index

Backup snapshots with rsync


Backing up data is something that most sysadmins need to do regularly. In addition to backing up local files, we may need to backup data from a web server or from remote locations. rsync is a command that can be used to synchronize files and directories from one location to another while minimizing data transfer using file difference calculations and compression. The advantage of rsync over the cp command is that rsync uses strong difference algorithms. Additionally, it supports data transfer across remote machines. While making copies, it compares the files in the original and destination locations and will only copy the files that are newer. It also supports compression, encryption, and a lot more. Let us see how to work with rsync.

How to do it...

Let's see how to copy files and create backups with rsync:

  1. To copy a source directory to a destination use:

    $ rsync -av source_path destination_path
    For example,
    $ rsync -av /home/slynux/data [email protected]:/home...
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