I have the issue with my one of my linodes - process name "sustes" which is using cpu at 600% continuously. Searching online I found this link - https://www.digitalocean.com/community/questions/what-is-this-sustes-in-my-process-in-my-cpu-stats, and it may be that someone using the server to mine bitcoins (lol, not lol). Did anyone had a similar issue? How to take it down? Seems like 'usual' methods don't work.