Software 42492 Published by

Martin Maurer has announced the release of Proxmox VE 6.4. This version comes with Ceph Octopus 15.2.11 and Ceph Nautilus 14.2.20, many enhancements to KVM/QEMU, and bug fixes.

Proxmox Virtual Environment 6.4

We are proud to announce the general availability of Proxmox Virtual Environment 6.4, our open-source virtualization platform. This version brings unified single-file restore for virtual machine (VM) and container (CT) backup archives stored on a Proxmox Backup Server as well as live restore of VM backup archives located on a Proxmox Backup Server.

Version 6.4 also comes with Ceph Octopus 15.2.11 and Ceph Nautilus 14.2.20, many enhancements to KVM/QEMU, and notable bug fixes. Many new Ceph-specific management features have been added to the GUI. We have improved the integration of the placement group (PG) auto-scaler, and you can configure Target Size or Target Ratio settings in the GUI.

The new version is based on Debian Buster 10.9, but using a newer, long-term supported Linux kernel 5.4. Optionally, the 5.11 kernel can be installed, providing support for the latest hardware. The latest versions of QEMU 5.2, LXC 4.0, and OpenZFS 2.0.4 have been included.

There are some notable bug fixes and smaller improvements, see the full release notes.

Release notes

Press release

Video tutorial

Alternate ISO download:


Community Forum

Source Code



Q: Can I dist-upgrade Proxmox VE 6.x to 6.4 with apt?
A: Yes, just via GUI or via CLI with apt update && apt dist-upgrade

Q: Can I install Proxmox VE 6.4 on top of Debian Buster?
A: Yes, see

Q: Can I upgrade my Proxmox VE 5.4 cluster with Ceph Luminous to 6.x and higher with Ceph Nautilus and even Ceph Octopus?
A: This is a three step process. First, you have to upgrade Proxmox VE from 5.4 to 6.4, and afterwards upgrade Ceph from Luminous to Nautilus. There are a lot of improvements and changes, please follow exactly the upgrade documentation.

Finally, do the upgrade to Ceph Octopus -

Q: Where can I get more information about feature updates?
A: Check our  roadmap forum mailing lists, and subscribe to our  newsletter.

A big THANK YOU to our active community for all your feedback, testing, bug reporting and patch submitting!