What language should I learn?

I'm getting into networking (currently studying for the CCNA) and I'm wondering what language(s) would be good to learn.

Let me clarify. I don't plan on getting into programming full-time or even on the side; I'm more interested in learning something to make my job applications look more impressive. While the network administration job market isn't as over-saturated as that of /prog/ramming, it's still not ideal. I want to have an edge over the competition.

With all of this in mind, please suggest something that employers looking for a network administrator would like too see (and perhaps have a use for), not something you personally think is the best due to its good syntax or garbage collection or whatever other qualities you look at when determining whether a language is ``good'' or not.

Basically, a ``sellable'' language rather than a useful one.

>>1
If I were hiring a network administrator, I wouldn't ask for any programming other than knowledge of the UNIX shell (shell so-called scripts) and whatever he'll be managing. I'd value Python in case he needs to build some tool to do something. I wouldn't value Java as it's not useful for network administration.

I'd require GNU/Linux wizardry, though. Focus on that.