Complete Unix and Shell Programming Tutorial. Topics covered 1. Getting Started 2. File Management 3. Directories 4. File Permission 5. Environment 6. Basic Utilities 7. Pipes & Filters 8. Processes 9. Communication 10. The Vi Editor 11. What Is Shell? 12. Using Variables 13. Special Variables 14. Using Arrays 15. Basic Operators 16. Decision Making 17. Shell Loops 18. Loop Control 19. Shell Substitutions 20. Quoting Mechanisms 21. IO Redirections 22. Shell Functions 23. Manpage Help 24. Adva