Kumari - Linux Shell Scripting Essentials

Sinny Kumari has been a GNU/Linux user since the beginning of her college days. Her passion is to contribute to free software that benefits millions of people. She is a KDE contributor, KDE e.V. member, Fedora packager, and a Google Summer of Code mentor.

To keep up her passion in open source, she has been working as a software engineer at Red Hat after completing her bachelor's degree in computer science in 2012. As part of her work, she contributes to the Libabigail project that helps with ABI analysis on ELF binaries. She also loves going to technical conferences and sharing her experiences by giving talks. Her blogs about almost all of these activities can be found at http://sinny.io/.

I want to thank my parents who have always supported, encouraged, and provided me with the best education. I would also like to thank my friends and family who were always around me to cheer me up. Special thanks to my friend, Shantanu Tushar, who clarified a few doubts I came across while writing this book. I would also like to thank the reviewers of this book and the entire PacktPub team.

Grigor Aslanyan is a theoretical cosmologist with a strong focus on computational methods for data analysis. He has a PhD in physics from the University of California, San Diego, and is currently a postdoctoral research fellow at the University of Auckland in New Zealand.

Grigor was born and raised in Armenia. He obtained both bachelor's and master's degrees in physics and computer science at Yerevan State University, before moving to California for his PhD studies. He has also worked as a software engineer for three years at Pont Solutions (a company later acquired by Mentor Graphics).

Grigor's research focuses on studying the theory of the very early universe by using experimental data from cosmic microwave background radiation and galaxy surveys. His research requires the development and implementation of complex numerical tools used to analyze the data on large computational clusters, with the ultimate goal of learning about the theory of the early universe. Grigor's current research is focused on applying advanced data science and machine learning techniques to improve data analysis methods in cosmology, making it possible to analyze the large amounts of data expected from the current and future generation experiments.

Grigor has implemented the publicly available numerical library Cosmo++ that includes general mathematical and statistical tools for data analysis as well as cosmology-specific packages. The library is written in C++ and is publicly available at http://cosmopp.com.

I would like to thank the University of Auckland and my supervisor Richard Easther for supporting my work on this book.

Mohamed Fawzy is an open source geek who adores working with servers. He has been working with Linux since 2013working and delivering training in Linux system engineering. He has many contributions in open source communities, especially in Egypt where he is a Fedora project contributor and ambassador. He currently lives in Egypt and studies in Mansoura University.

I would like to express my deepest appreciation to all those who have provided me the opportunity to achieve my life goals.

I want to express my warm thanks to my family, especially my father who always supports me. I would like to thank my friends, Mohamed Desoky and Yomna Hafez who are engineers, and also my team, CatReloaded, and its core members, especially Amira, for my graduation project, Fedora. I would also like to thank all the contributors who work as friends, Levex, Zoltan, and others, for their support and guidance in my life.

Special gratitude I give to our project manager, Sanchita Mandal, who coordinated the project well, the writer who did her best to write this book, and Packt Publishing.

Thanks to you all for being in my life.

John Kennedy has worked with UNIX and Linux since 1998. He has been shell scripting since 2001. His preferred language is BASH, although he has dabbled in Python.

He has been reviewing and tech-editing books in his spare time since 2001 and has about 20 books under his belt. He believes the best part of reviewing is that he learns something from every book he works on.

John was born in the US and grew up in Northern Virginia. He spent some time in the US Air Force and has lived in Germany and the United Kingdom. He is married to Michele and has two children, Denise and Kieran. He currently lives in Northern Virginia.

I would like to thank my family including my nephews, Aiden and Mason, and my niece, Harriet, for supporting all the silly things I do and for giving me the time to work on this.

I would also like to thank Sanchita Mandal who possesses great patience and flexibility and was very supportive. Also, my thank go to the author, Sinny Kumari who made this book easy to review and educational to read. Everyone at Packt also deserves recognition for all the titles and hard work that goes into producing them.