- Linux Shell Scripting Essentials
- Table of Contents
- Linux Shell Scripting Essentials
- Credits
- About the Author
- About the Reviewers
- www.PacktPub.com
- Preface
- 1. The Beginning of the Scripting Journey
- 2. Getting Hands-on with I/O, Redirection Pipes, and Filters
- Standard I/O and error streams
- Redirecting the standard I/O and error streams
- Pipe and pipelines – connecting commands
- Regular expressions
- Filtering an output using grep
- Editing output using sed
- Duplicating a stream using tee
- Sorting and finding unique text
- Character-based translation using tr
- Filtering based on lines—head and tail
- The Cut-based selection
- Summary
- 3. Effective Script Writing
- Exiting from scripts and exit codes
- Testing expressions with a test
- Using conditional statements with if and else
- Indexed arrays and associative arrays
- Looping around with for
- The select, while, and until loops
- Switch to my choice
- Passing stdout as a parameter using xargs
- Using functions and positional parameters
- Alias
- pushd and popd
- Summary
- 4. Modularizing and Debugging
- 5. Customizing the Environment
- 6. Working with Files
- 7. Welcome to the Processes
- 8. Scheduling Tasks and Embedding Languages in Scripts
- Index
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.
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