Richard Blum has over 30 years’ experience working as a system and network administrator. He is the bestselling author of the fourth edition of the Linux® Command Line and Shell Scripting Bible and Linux All-In-One For Dummies, 7th Edition. He’s an online Linux instructor and teaches Linux command line and shell scripting courses at Coursera, Udemy, and ed2go.com.Christine Bresnahan is co-author with Richard Blum of previous editions of CompTIA Linux+ Study Guide, Linux Essentials, and the Linux Command Line and Shell Scripting Bible.

• Introduction xxxiPart I: The Linux Command Line 1Chapter 1: Starting with Linux Shells 3Chapter 2: Getting to the Shell 17Chapter 3: Basic Bash Shell Commands 37Chapter 4: More Bash Shell Commands 69Chapter 5: Understanding the Shell 93Chapter 6: Using Linux Environment Variables 113Chapter 7: Understanding Linux File Permissions 137Chapter 8: Managing Filesystems 161Chapter 9: Installing Software 181Chapter 10: Working with Editors 201Part II: Shell Scripting Basics 229Chapter 11: Basic Script Building 231Chapter 12: Using Structured Commands 257Chapter 13: More Structured Commands 291Chapter 14: Handling User Input 319Chapter 15: Presenting Data 347Chapter 16: Script Control 369Part III: Advanced Shell Scripting 397Chapter 17: Creating Functions 399Chapter 18: Writing Scripts for Graphical Desktops 421Chapter 19: Introducing sed and gawk 449Chapter 20: Regular Expressions 477Chapter 21: Advanced sed 497Chapter 22: Advanced gawk 527Part IV: Working with Alternative Shells 555Chapter 23: The zsh Shell 557Chapter 24: The tcsh Shell 583Chapter 25: The Korn Shell 611Appendix A: Quick Guide to Bash Commands 633Appendix B: Quick Guide to sed and gawk 647Index 659

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