Need to reinstall Munin on Redhat 5.2

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http://unix.stackexchange.com – We are facing a problem on one of our server on which munin is installed. Actually it is not showing any any information of clients(nodes)connected to it. I restarted the munin-node service running on service but it is still not showing anything. So im planning to reinstall the application itself. So I need to know how to uninstall this app. Or i can simply delete the files of munin. And install the new one. All graphs on Munin webpage are empty Nodes are there but the graphs are showing. (HowTos)