The purpose of this chapter was to elucidate some concepts with regards to troubleshooting active processes and in this respect we have managed to sweep through the hallways of swap, vmstat, top, ps, process IDs, kill, and pkill. Of course, there are many more utilities at your disposal but for most troubleshooters (beginner and experienced alike), knowing how to monitor and measure memory usage; determining server load; watching for power-greedy applications, services, or users; removing orphaned processes; and using systemd will easily serve you well before we move forward and consider an approach to troubleshoot the network.