In this tutorial you'll learn to create your own commands using functions.

1. Introduction
2. Shell, Kernel, Terminal & More
3. View System Date, Calender
4. Create Files & Directories
5. Text Files: Create, Merge & Play
6. Rename & Delete Files & Directories
7. Create Copies, Links to Files & Directories
8. File Permissions
9. See What's In Using 'ls'
10. Change File Permissions Using 'chmod'
11. Count Lines, Words & Characters Using 'wc'
12. Sort
13. Cut Through Your Files
14. Convert & Copy Files With 'dd'
15. Get Help, View Fancy Text & Reduce File Size
16. Hello World!
17. Use Commands In Your Scripts
18. Shell Variables, Grab User Input Using 'read'
19. Positional Parameters
20. More On Positional Parameters
21. Reverse Quotes Or Accent Graves
22. Count The Number of Command Line Arguments Using $#
23. Math On Integers Using 'expr'
24. Operator Precedence
25. Math On Real Numbers
26. Escape Sequences
27. Do Cool Things With 'tput'
28. 'if-then' Statement in Action
29. : The 'if-then-else' Statement
30. Run Checks on Numbers
31. Run Checks On Files
32. Append Text to a File Through Shell Script
33. Run Checks On Strings
34. The 'AND' Logical Operator
35. Count The Number of Characters in User's Input in Your Script
36. The 'OR' Logical Operator
37. The 'case' Statement
38. Another Date With 'case' Statement
39. The 'while' Loop
40. The 'until' Loop
41. The 'for' Loop
42. Rant & Little Work
43. Search Patterns Using 'grep'
44. The 'passwd' File Explained
45. The Internal Field Separator
46. 'passwd' File Revisited
47. Reading From a File
48. Sleep while you are at work
49. Count the number of words & sentences in a text file without using 'wc'
50. Fetch & Redirect Man Pages of commands using 'for loop'
51. Nested Loops
52. The 'break' Statement
53. The 'continue' Statement
54. More on Metacharacters
55. Adding & Removing Users
56. Know when users log in Part One
57. : Know when users log in Part Two
58. Know when users log in Final Part
59. Communicate with other users using 'write'
60. Create Your Own Commands Using Functions
61. Executing Multiple Scripts
62. Conclusion

This series is a collection of 62 video tutorials on UNIX/Linux Shell Programming. The tutorials are designed to benefit beginners but experienced shell programmers may also learn a few tricks of the trade in the course.