Assistance/Hands-On Help Requested for Server Memory Issues?

Hi Everyone,

I'm new, and clueless, I might as well get that out of the way first up :-( I'm hoping to find a helper, one of you very clever persons/system administrator perhaps?, who can log into my Linode setup and troubleshoot for me, why my new site reports a 500 error every 2 days and stops serving? I hate to ask - I have to manually reboot every 2 days or so to serve it again. Sorry to ask, and also I apologise if this is not the way to ask for help? I'm not tech-minded. I ask for practical hands-on help, because I've been through all the help sections diligently, but as a tech N00b, I don't have the foggiest what the hell I'm looking at..!

Thank You,