Joan Cros/NurPhoto via Getty ImagesFollow ZDNET: Add us as a preferred source on Google.ZDNET's key takeawaysMicrosoft released its first full Linux distro: Azure Linux 4.0Azure Linux has split into Azure Container Linux and the new virtual machine edition: Azure Linux.Microsoft effectively admits that it's a de facto Linux-based company.Minneapolis - So, there I was at Open Source Summit North America, listening to Brendan Burns, co-founder of Kubernetes and today Microsoft's Corporate VP of Az...