In this chapter, we tried to describe some basic troubleshooting steps that can be applied generally and when troubleshooting KVM. We also discussed some of the problems that we had to deal with while working with various subjects of this book – Eucalyptus, OpenStack, the ELK stack, cloudbase-init, storage, and more. Most of these issues were caused by misconfiguration, but there were quite a few where documentation was severely lacking. Whatever happens, don't give up. Troubleshoot, make it work, and celebrate when you do.