Raspberry (PiHole): 500 Internal Server Error

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It happened already twice today, I try to reach the dashboard and I get "500 Internal Server Error"; I can ping the raspberry but SSH does not work (connection closed by peer)

A reboot will fix the problem

Any ideas?

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There is a ton of situations here, you probably need some level of monitoring on your system. If it happens "a lot" then I'd look at a partition like your /var partition, filling up and the OS not being able to write to it.

With the reboot, typically your /tmp/ and /var partitions get cleaned out allowing you to administer the machine.

So, tl;dr? The best thing would be to set up some type of monitoring on your raspberry pi and watch the graphs. If you have no idea where to start, datadog will help you get off the ground.