I want to figure out what type of Red Hat Linux machine I am using. Is there a file on my system I can look at?
Should be what you are looking for.
uname -a will do it, and has the benefit of working on almost all distros and showing you other system info too.
In addition, you can try looking at
/proc/version if your system has it.
If it's recent enough:
Should give you some good information.
Right you can use lsb_release -a, or may be:
cat /etc/issue; uname -a
If you are interested in finding out the processor details
/proc/cpuinfo or memory details
/proc/meminfo will work as well. CPU info is particularly useful if you need to check for support of certain kinds of instruction extensions. It will list out all the supported extensions of the present CPU and also its present operating speed.