Ever wonder if the next language you learn should be Ruby, Python, or the next latest fad to hit the streets. If so then maybe you should take some advice from Daniel Ostermeier and Jason Sankey.
for me, the single programming language I use most frequently day-to-day, alongside my primary language, is bash scripting. Yep, plain old hackish shell scripts.
 
Yes, that is correct. These guys are recommending that you go and learn how to program in bash. And they are not taking no for an answer.
So, no excuses! Even those of you more inclined to the Windows way of life have easy access to bash (and other shells) via Cygwin.

Why do these guys like bash scripting? You can find the answer to that question in their blog. In the meantime maybe you’d like to share your opinions on the usefulness of bash.