News
Zainium OS is a rolling release — this is its changelog.
The story of Zainium OS
How one simple question turned into a new Linux system with no /usr, its own kernel patch, an open filesystem standard and a first public ISO.
Differences between Zainium OS and classic immutable distributions: architecture and limitations
How Zainium OS internally works, what sets us apart from Ubuntu Core, Fedora Silverblue, Vanilla OS, or NixOS, and our technical limitations.
Can a file hide a program of the base? We tested it
A file in the software layer could hide a base program. We tested the problem, fixed it in the kernel and the boot program, and measured what the fix costs.
A base that root can not touch: how Zainium OS works, from zero
Why Zainium OS has no /usr, why we patched OverlayFS, and what immutable really means here, explained from the beginning.
The first Zainium OS ISO
A live ISO with the full COSMIC desktop and the installer, on a base that cannot be changed while it runs.
Sealing installed software is now your choice
The base and the boot files stay sealed with fs-verity at every boot; your installed software is sealed only when you turn it on.
glibc next to musl: test report
35 checks of glibc 2.44 on an installed Zainium OS, against every rule of the musl and glibc page. All passed.
Security report: 2 November 2026
What we tested on an installed Zainium OS before the release, the exact results, and what is still open.
Zainium OS: a sealed system you can still install software on
The base is now read-only even for root, every system file is sealed, and new software shows up without a reboot.
quantra-ramfs and zainium-fsverity: how Zainium OS boots and protects its files
The two pieces that build and protect the system before anything else runs — a Rust initramfs and a pure-Rust fs-verity library.
Introducing the Dualayer Hierarchy Standard
Zainium's filesystem layout is now an open specification — a layered hierarchy in which musl and glibc run side by side.
Zainium OS is a rolling release
No version numbers — install once and stay current. ISO snapshots are named after their date.