Server Edition · amd64

Download CMai OS

Download the installation image, verify it against its SHA-256 digest, and follow the installation steps. The ISO installs unattended and takes the whole of the selected disk.

Latest release

All releases

Each release is a folder; open one to see the ISO, its SHA-256, the build information and the log. The three newest builds are kept.

Verification:

curl -LO https://releases.cmaios.net/cmaios-latest-amd64.iso
sha256sum -c cmaios-<version>-amd64.iso.sha256   # Linux/macOS
certutil -hashfile cmaios-<version>-amd64.iso SHA256   # Windows

About the ISO

What's in the image

CMai OS — our own Linux distribution: our own kernel configuration and an Ed25519-signed update channel; amd64
CMai · Claude Code · Gemini CLI · Kimi CLI — ready in every user's workspace; the CMai CLI (cmai) reaches every model through the CMai API on one key
Rootless podman workspaces with per-user quotas
Publishing on an automatic subdomain with TLS
Local admin panel (https://<ip>:8443) and the cmai CLI
Security: TLS 1.2+/1.3, key-based SSH, default-deny nftables firewall, fail2ban

Requirements

An x86-64 processor; BIOS or UEFI (Secure Boot off)
Trial: 2 vCPU · 4 GB RAM · 40 GB disk
Team: 8 vCPU · 32 GB RAM · 500 GB NVMe recommended
In a virtual machine, set networking to bridged

Detailed requirements →

Installation flow

Write the ISO to a USB stick or attach it to a virtual machine, then boot
The unattended install takes the whole disk and reboots
Open the address on the console card, enter the setup code and your licence key
ssh <admin>@<ip> → cmai

Step-by-step installation →

Version numbers and files

0.1.0-dev.<n>+<sha> — build counter + short git hash
In every release folder: -amd64.iso · .sha256 · -BUILD.txt · -build.log
cmaios-latest-amd64.iso is always the newest release
index.json lists every release, latest.json the newest one (machine readable)
Installed version: cmai license status · update: cmai update apply