I wanted to custimize the linux command "write" (send messages to tty) by
modifying the source a bit. I'm having a hard time figuring out where the
source lies on my RHEL system.

I normally use the yum install feature. I've been told write is a part of
util-linux and to use up2date --get-source to do this on older systems. Any
ideas what's the best way to do this?