So here are some dead easy ways of getting munin and munin-node installed on your RHEL5 server.

First add RPM Forge repository rpm -Uhv

Then just fire

yum install munin munin-node

Now, you have your munin running. Lets turn our attention to monit.

First add this new repo to you rpm -Uvh

Then go ahead and install monit using yum install monit

Now this my friend was real easy ! Have fun , more later.