This chapter was intended to provide an introduction to the subject of troubleshooting CentOS 7 without the intention of burdening you with yet another list of rules, instructions, or procedures that would ill-suit your circumstances or immediate needs. As we know, troubleshooting is a journey, and where the first chapter has served to introduce you to a selection of concepts and methods, every page that follows will ensure that you are one step closer to being at ease with the server you are about to diagnose and repair. So yes, the journey has just begun, and we will now approach the subject of troubleshooting active processes.