How hard is it on making Shell Scripts?

Is it really hard? What do you need to know...?

>>10
Which doesn't make Perl or Python with it's runtime (which still needs to be initialized) a better alternative for some tasks.

Oh man. Another one who thinks that there is *the* language for everything...
THE CHOICE OF THE LANGUAGE IS CORRECT IF IT WORKS.

And a shell-script works *everywhere*.
Python doesn't.