Dual-Root Linux: Blue-Green Deployments for Your Operating System

Traditional Linux upgrades modify live systems and make rollback painful. This article shows how dual-root partitions apply DevOps blue-green principles to OS upgrades—building a new OS beside the old one, testing it safely, and switching via GRUB only when ready. The result: predictable upgrades, seconds-long rollback, minimal downtime, and far less operational stress.