Plesk Have high CPU/memory usage?

OK, lately I saw a couple of threads on this forum reporting problems with high CPU and/or memory usage. Naturally, this can be caused by a multitude of reasons and usually requires investigation. I decided to post a couple of common reasons and solutions here (this was written with Plesk 11 for Linux in mind, …

Plesk Checking to see if you have been attacked / infected

So you have patched your server, the hacker can’t get in again – so now we need to tidy up any files which may have been added. In my case I found 13 rogue perl scripts within cgi-bin folder of different domains. Each file had a random filename eg. motherboard.pl / preconnective.pl / etc. and …