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Abs guide 2 Advanced Bash-Scripting Guide C CAdvanced Bash-Scripting Guide Table of Contents Advanced Bash- Scripting Guide An in-depth exploration of the art of shell scripting Mendel Cooper Dedication Part Introduction Chapter Why Shell Programming Note

Advanced Bash-Scripting Guide C CAdvanced Bash-Scripting Guide Table of Contents Advanced Bash- Scripting Guide An in-depth exploration of the art of shell scripting Mendel Cooper Dedication Part Introduction Chapter Why Shell Programming Notes Chapter Starting O ? With a Sha- Bang Invoking the script Notes Preliminary Exercises Part Basics Chapter Special Characters Notes Chapter Introduction to Variables and Parameters Variable Substitution Notes Variable Assignment Bash Variables Are Untyped Special Variable Types Notes Chapter Quoting Quoting Variables Notes Escaping Chapter Exit and Exit Status Chapter Tests i CAdvanced Bash-Scripting Guide Table of Contents Test Constructs File test operators Notes Other Comparison Operators Notes Nested if then Condition Tests Testing Your Knowledge of Tests Chapter Operations and Related Topics Operators Notes Numerical Constants Part Beyond the Basics Chapter Variables Revisited Internal Variables Notes Manipulating Strings Manipulating strings using awk Further Discussion Notes Parameter Substitution Notes Typing variables declare or typeset Notes Indirect References RANDOM generate random integer Notes The Double Parentheses Construct Chapter Loops and Branches ii CAdvanced Bash-Scripting Guide Table of Contents Loops Notes Nested Loops Loop Control Notes Testing and Branching Chapter Command Substitution Notes Chapter Arithmetic Expansion Chapter Recess Time Part Commands Chapter Internal Commands and Builtins Job Control Commands Notes Chapter External Filters Programs and Commands Basic Commands Notes Complex Commands Notes Time Date Commands Text Processing Commands Notes File and Archiving Commands Notes Communications Commands Notes Terminal Control Commands Math Commands iii CAdvanced Bash-Scripting Guide Table of Contents Miscellaneous Commands Notes Chapter System and Administrative Commands Analyzing a System Script Notes Part Advanced Topics Chapter Regular Expressions A Brief Introduction to Regular Expressions Notes Globbing Notes Chapter Here Documents Here Strings Chapter I O Redirection Using exec Notes Redirecting Code Blocks Applications Chapter Subshells Notes Chapter Restricted Shells Chapter Process Substitution Notes Chapter Functions Complex Functions and Function Complexities Notes Local Variables Local variables and recursion Notes iv CAdvanced Bash-Scripting Guide Table of Contents Recursion Without Local Variables Chapter Aliases Notes Chapter List Constructs Chapter Arrays Chapter dev and proc dev Notes proc Notes Chapter Of Zeros and Nulls Chapter Debugging Notes Chapter Options Chapter Gotchas Notes Chapter Scripting With Style Uno ?cial Shell Scripting Stylesheet Notes Chapter Miscellany Interactive and non-interactive shells and scripts Operator Precedence Notes Shell Wrappers Notes Tests and Comparisons Alternatives A script calling itself recursion v CAdvanced Bash-Scripting Guide Table of Contents Colorizing Scripts Notes Optimizations Notes Assorted Tips Ideas for more powerful scripts Widgets Security Issues Infected Shell Scripts Hiding Shell Script Source Writing Secure Shell Scripts Notes Portability Issues Notes Shell Scripting Under Windows Chapter Bash versions and Bash version Notes Bash version Bash version Bash version Chapter Endnotes Author's Note Notes About the Author Notes Where to Go For Help Notes Tools Used to Produce This Book Hardware Software and Printware Credits vi CAdvanced Bash-Scripting Guide Table of Contents Disclaimer Bibliography Appendix A Contributed Scripts Appendix B Reference Cards Appendix C A Sed and Awk Micro- Primer C Sed Notes C Awk Appendix D Exit Codes With Special Meanings