Linux Shell Scripting Tutorial v2 - ossblog.org

1 PDF generated using the open source mwlib toolkit. See for more generated at: Wed, 02 Mar 2011 23:26:14 UTCL inux Shell Scripting by Vivek Gite Edited By Various ContributorsLinux Shell Scripting Tutorial - A beginner 's handbook:About1 Linux Shell Scripting Tutorial - A beginner 'shandbook:AboutThis document is Copyright (C) 1999-2009 by Vivek Gite [1] and its contributors. Some rights book is for students and Linux System Administrators. It provides the skills to read, write, and debug Linuxshell scripts using bash Shell .

2 The book begins by describing Linux and simple scripts to automate frequentlyexecuted commands and continues by describing conditional logic, user interaction, loops, menus, traps, andfunctions. Finally, book covers various sys admin related scripts such as making a backup, using cron jobs, writinginteractive tools, web based tools, remote login, ftp and database backup related scripts. This book is intended forLinux system administrators or students who have mastered the basics of a Linux Operating System.

3 You should beable to: Login to local or remote Linux system. Use basic Linux commands, such as cp, mv, rm, man,less, chmod and others. Create and edit text files in vi or any other text editor. GUI is not required except for interactive GTK+ based GUI InformationThis book is available under Creative Commons Attribution-Noncommercial-Share Alike Unported [2]. You are free: to Share to copy, distribute and transmit the work to Remix to adapt the work Under the following conditions: Attribution If you republish this content, we require that that the content is from " Linux Shell Scripting Tutorial - A beginner 's handbook" (http:/ / biz/ guide/ Main_Page), and nixCraft (http:/ / nixcraft.)

4 Com/ ). to the original article on the source site ( , http:/ / bash. cyberciti. biz/ guide/ What_Is_Linux) the author name ( , Vivek Gite) for all each contributors name back to their profile page on the source wiki ( , http:/ / bash. cyberciti. biz/guide/ User:USERNAME) Noncommercial You may not use this work for commercial purposes including the Internet ad supportedwebsites or any sort of print media. Share Alike If you alter, transform, or build upon this work, you may distribute the resulting work only underthe same or similar license to this the understanding that: Waiver Any of the above conditions can be waived if you get permission from the copyright holder ( theAuthor: Vivek Gite).

5 Other Rights In no way are any of the following rights affected by the license: Your fair dealing or fair use rights; The author's moral rights; Rights other persons may have either in the work itself or in how the work is used, such as publicity or Shell Scripting Tutorial - A beginner 's handbook:About2 Notice For any reuse or distribution, you must make clear to others the license terms of this work. The bestway to do this is with a link to this web page (http:/ / bash. cyberciti. biz/ guide/Linux_Shell_Scripting_Tutorial_-_A _Beginner%27s_handbook:About).

6 History - 1998 - First draft with only 8 pages. - 2000 - Second draft with a few more pages. - 2002 - Third draft published on - 2004 - Updated version published on - Aug-2009 - Wiki started. This document is now in a wiki format. All user contributed content licensed under Attribution-Noncommercial-Share Alike This web site / wiki ("Site") provides educational learning information on Linux Scripting for sys admin work, butyou are 100% responsible for what you do or don't do with it. The information compiled by Vivek Gite (and its contributors) as well as the links to complimentary material areprovided "as is" with no warranty, express or implied, for their accuracy or reliability.

7 You use these sites at your own risk, and acknowledge that, while every effort has been made to correct errorsbefore they appear, this site may include certain inaccuracies, errors, or omissions. nixCraft makes norepresentations as to the suitability, reliability, availability, timeliness, and accuracy of the information on this sitefor any purpose. Using this site ( ) means you accept its terms [3]. All trademark within are property of their respective holders. Although the author and its contributors believes the contents to be accurate at the time of publication, no liabilityis assumed for them, their application or any consequences thereof.

8 If any misrepresentations, errors or other needof clarification is found, please contact the us immediately [4]. Please read our disclaimer [3] and privacy policy[5]. The opinions and ideas expressed in this book are solely those of the author, and do not necessarily reflect thoseof nixCraft consultancy services [6] and/or my current/past the author This book is created and maintained by Vivek Gite - a Sr. UNIX admin. Vivek is specialized in the design of highperformance computing (HPC) using Linux , security and optimization for the internet and intranet usage.

9 Vivekhas a particular interest in TCP/IP, Anti DDoS, Server side optimization, computer clusters, parallel computing,HPTC and embedded Linux / FreeBSD devices etc. Visit my Linux admin blog [7] for more tutorials , guides andnews about Shell Scripting Tutorial - A beginner 's handbook:About3 Feedback Please give me your feedback. Whatever you see here, is based upon my own hard-earned experience. I havetaught myself both through trial and error. Shoot me an email at [8]. If you see a typo, a spelling mistake, or an error, please edit wiki page.

10 Alternatively, you can tell me about it bysending me an you found this book useful please send charitable donations ($10 is minimum and recommended) to the followingnon-profit organization that helps to support, promote, and develop free software: The FreeBSD Foundation [9] The Free Software Foundation (FSF) [10] The OpenBSD Foundation [11] The Linux Foundation [12]References[1]http:/ / vivekgite. com/[2]http:/ / creativecommons. org/ licenses/ by-nc-sa/ 3. 0/[3]http:/ / www. cyberciti. biz/ tips/ disclaimer[4]http:/ / www.