Korn shell (ksh), a command-line interface for Unix. The main advantage of ksh over the traditional Unix shell is in its use as a programming language. Since its conception, several features were gradually added, while maintaining strong backwards compatibility with the Bourne shell.
IBM has published Korn shell scripting - A beginner's guide:
Korn shell scripting can save you a lot of time and make your job so much easier. It can seem intimidating at first, but remember to always start out simple and build upon each and every script. Always follow the same steps: build your script header, define your variables, and error check your work. You just might find yourself trying to write a script for everything you do.
Korn shell scripting is something all UNIX users should learn how to use. Shell scripting provides you with the ability to automate many tasks and can save you a great deal of time. It may seem daunting at first, but with the right instruction you can become highly skilled in it. This article will teach you to write your own Korn shells scripts.