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XCP-ng
A free, open-source virtualization platform built on the Xen hypervisor, forked from Citrix Hypervisor to remain a fully open alternative for running and managing virtual machines at scale.
Based on
CentOS (Xen-based)
First released
2018
Package manager
Yum (.rpm, managed via Xen Orchestra web UI)
Desktop environments
None (managed via a separate Xen Orchestra web UI)
XCP-ng forked from Citrix Hypervisor (formerly XenServer) specifically to keep a fully open-source, community-governed version of that Xen-based virtualization platform available, free of Citrix's commercial licensing and feature restrictions. It's commonly paired with Xen Orchestra, a separate web-based management application (from the same community) for managing pools of XCP-ng hosts, VM backups, and live migration from one central dashboard. Alongside Proxmox VE (which uses KVM rather than Xen), it's one of the two leading open-source alternatives that gained significant additional attention after VMware's licensing changes under Broadcom pushed many organizations to evaluate non-VMware virtualization platforms.
MirrorNest doesn't mirror distro ISOs — installation media should always come straight from the project's own official download page (linked above), so you get the correct checksum/signature to verify against.