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.
BASH shell is default on many UNIX / Linux systems. There is an interview with Chat Ramney, maintainer of BASH, the Bourne Again Shell. He talke about his experience maintaining Bash and few other things. From the page:
Bash, or the Bourne-Again Shell is a Unix shell created in 1987 by Brian Fox. According to Wikipedia, the name is a pun on an earlier Unix shell by Stephen Bourne (called the Bourne shell), which was distributed with Version 7 Unix in 1978.
In 1990, Chet Ramey, Manager of the Network Engineering and Security Group in Technology Infrastructure Services at Case Western Reserve University, became the primary maintainer of the language.
Computerworld tracked down Ramey to find out more.
=> The A-Z of Programming Languages: BASH/Bourne-Again Shell
The joke on this page was obtained from the FSF's email archives of the GNU Project:
There are four major species of Unix sysad:
1.The TECHNICAL THUG. Usually a systems programmer who has been forced into system administration; writes scripts in a polyglot of the Bourne shell, sed, C, awk, perl, and APL.
2.The ADMINISTRATIVE FASCIST. Usually a retentive drone (or rarely, a harridan ex-secretary) who has been forced into system administration.
3.The MANIAC. Usually an aging cracker who discovered that neither the Mossad nor Cuba are willing to pay a living wage for computer espionage. Fell into system administration; occasionally approaches major competitors with indesp schemes.
4.The IDIOT. Usually a cretin, morpohodite, or old COBOL programmer selected to be the system administrator by a committee of cretins, morphodites, and old COBOL programmers.
HOW TO IDENTIFY YOUR SYSTEM ADMINISTRATOR: