I am maintaining a cloud server (ubuntu 14, webuzo) on Amazon (AWS).
Recently the usage of CPU and RAM are increasing high which cause the server going down.
i thought there is an attact to the server, then i try to modify the security from the AWS console. I block all the ports, except for accessing the control panel of my hosting panel which i set it to only accept from my ip address.
But still, the CPU and RAM usage is still high.
I guess this is not caused from the outside(attact/flood), but it comes from inside the server.
So the question is how to know or determine what is the cause?
top and see whats taking your CPU and RAM if not critical kill unnecessary process, with
kill <pid> or
kill -9 <pid>