System Admin Programing Language

Hello all: I have been debating with myself and doing research as to which programing language would be necessary for a Sys Admin of CentOS/RHEL. I have attempted to learn C, but have not really found any situation that it would be needed, unless I am creating programs for Linux. I was debating between python, perl, or ruby. What is the opinion of everyone and if you have another language that you recommend please let me know.

JR