"Operating system security has always been a hallmark of Linux. With the introduction of immutable distributions -- CoreOS, launched in 2013, was among the first -- no other operating system could match the level of security Linux offered. I welcome any opportunity to test a new immutable Linux distro. Over the weekend, I discovered ShaniOS. Also: Linux Mint vs. Zorin OS: I've tried both Windows alternatives, and here's my winner ShaniOS is an Arch-based Linux distribution that is immutable and includes Flatpak integration."
"Using Btrfs subvolumes, the system maintains two complete system states -- labeled "blue" and "green." Only one state is active at any time, so atomic updates and rollbacks can occur with the highest level of reliability. For example, if you're using the blue environment, updates are applied to the green environment and then tested. You can then switch from the blue to the green environment during a reboot. In other words, you will always have a working instance of your OS, without fail."
ShaniOS is an Arch-based, immutable Linux distribution offering an immutable core managed by blue-green deployment using Btrfs subvolumes. The system maintains two complete states labeled blue and green so only one state is active, enabling atomic updates and reliable rollbacks. Application management uses Flatpak. Security features include AppArmor profiles, firewall configurations, and full-disk encryption. Performance optimizations include dynamic swap file creation and Nvidia GPU support. The shani-deploy command updates the inactive environment, applies updates without affecting the active environment, configures the bootloader to boot the updated environment, and ensures instant rollback capability. ShaniOS is available to download and use for free.
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