deSEC.io is a completely free, privacy-focused DNS hosting service that provides enterprise-grade features including DNSSEC, ACME integration for Let’s Encrypt certificates, and a comprehensive REST API.

This article introduces how to migrate a domain to deSEC.io.

Ubuntu Minimal Cloud Images are official Ubuntu images and are pre-installed disk images that have been customized by Ubuntu engineering to have a small runtime footprint in order to increase workload density in environments where humans are not expected to log in.

This article introduces how to create Ubuntu cloud images for testing on VMware and XenServer, other than KVM.

System VMs (Secondary Storage VM and Console Proxy VM) and Virtual Routers play key role in Apache CloudStack. If user want to apply a change on the system vms and VRs, they do not need to wait for next release with the fix, they can patch the VMs. This article describes the steps how to apply a patch to a system vm or a VR.

Recently I was asked by CloudStack users how to apply a patch (or patches) to their environments. It is very useful when the patch fixes a critical issue for them. So, this article describes the steps how to compile Apache CloudStack project using Ubuntu 22.04 docker container, and how to apply the patch to management servers and hosts.

The article CloudStack - Create Windows 11 VM instance on Ubuntu 22.04 introduces how to create a VM with vTPM and UEFI on Ubuntu hosts. There are some changes with it, see CloudStack - Create Windows 11 VM instance on Ubuntu (Update 2025.03).

This blog introduces how to create Window 11 VMs on RHEL/RockyLinux/AlmaLinux step by step. Rocky 8.6 will be used as an example.