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A wise old-timer (referred to as a "grey-beard") once mentioned a saying, "'''With Linux, learn it once, know it always'''". What is really means is if you take the time to learn how to do everything in Linux by issuing commands and understanding its files and structure, you can perform all of the tasks with or without graphical administration programs. Therefore, people that were working on UNIX systems in the 70's can still operate new Linux systems (and not have to pay $10.000 every 4 years to maintain their designation, or learn new graphical administration tools)...
Knowing which type of programming language to use when automating a task is based upon a programmers experience of knowing which is the "'''best tool for the task'''". Should the program is compiled (like C, C++, etc) for efficient operation (if a lot of people run same program within a compressed period of time), or should program be interpreted (eg. Shell Script, Perl Script, JavaScript) for ease of programming? Many factors are involved here, but shell scripting is definately an easy way for the adminstrator to automate rountine tasks... I will only be discussing Shell Scripting in the WIKI, although, you can access by webpage to learn other programming languages (like C - Course: IPC144)...
= Sample Shell Scripts =