Rocky Linux 10 for 64 bit Arm, a free RHEL 10 compatible enterprise Linux base for Azure Cobalt 100 Arm virtual machines.
Rocky Linux 10 is a community enterprise Linux distribution produced by the Rocky Enterprise Software Foundation to be binary compatible with Red Hat Enterprise Linux 10, running the 6.12 kernel and following the RHEL 10 lifecycle, with support to May 2035. This is the 64 bit Arm (AArch64) build with the standard 4k page size kernel, for the Arm based virtual machine sizes powered by the Azure Cobalt 100 processor, which pair strong per core performance with lower cost than comparable x86 sizes.
It suits teams standardising an enterprise Linux baseline on Arm: web and application tiers, containerised workloads, CI runners and cost sensitive fleets that want the RHEL 10 compatibility they already rely on, on Arm silicon. This listing tracks the Rocky Linux 10 major release; the machine reports the current 10 point release it is patched to at procurement time.
The cloudimg image is a Rocky Linux 10 Arm64 base brought fully up to date at build time and again immediately before capture, booted on its newest kernel with superseded kernels removed, with SELinux left in Enforcing mode and the root password locked. No credential is baked in: access is by the SSH key you choose at launch, root cannot log in over SSH, and SSH host keys and the machine id are regenerated per machine, so no two instances share a secret or an identity. Automatic updates, which the stock Rocky Arm64 cloud image does not ship at all, are installed, armed and enabled, never auto rebooting, so the machine keeps patching itself. SSH on port 22 is the only network listener: the Cockpit console on 9090 and rpcbind on 111, both left open by the stock image, ship disabled and are one command to re-enable. The rng-tools daemon, which cannot work on Cobalt 100 and leaves the stock image permanently degraded, also ships disabled. BaseOS, AppStream and Extras stay enabled so you keep a working update path, no subscription or licence key is required, and 24/7 support is included.