I agree with yowlingcat's point but I see where you are coming from and also agree with you. The way I see it, it's a bit like putting up a job posting for 'so

I agree with yowlingcat's point but I see where you are coming from and also agree with you. The way I see it, it's a bit like putting up a job posting for 'somebody who knows SSH'. While that is a useful skill, it's really not something you can specialize in since it's just a subset within linux/unix/network administration, if that makes sense.