Two of the best reasons for building shell scripts on Unix systems are 1) to repeat complex sets of instructions without having to rediscover or even retype the commands, and 2) to repeat complex sets ...

The Swish-e program is controlled by command line arguments (called switches). Often, it is run manually from a shell (command prompt), or from a program such as a CGI script that passes the command ...

In this article, I want to cover a more fundamental aspect of shell scripting: working with command arguments. I suspect that most shell scripts go through an evolution with their command flags, ...

Once you’ve gained a solid understanding of Linux and mastered the various commands available, your next big win comes in the form of shell functions. Code wrapped in a function can be reused by your ...

It hurts to see your programs taken apart and their weaknesses exposed, but it will make you a better programmer.