: "EVE-NG社区版跟专业版之间升降级只支持5.0版本" (Upgrading/downgrading between Community and Professional is only supported for version 5.0)
Operating an older version of EVE-NG introduces distinct maintenance requirements. Because old versions rely on unsupported Linux kernels or outdated packages, you must implement the following safeguards:
To keep your downgraded EVE-NG environment stable, prevent the system from automatically fetching newer packages during routine Linux maintenance.
Old versions of EVE‑NG (especially those on Ubuntu 16.04) may have outdated repository URLs. The official repositories for deprecated Ubuntu releases are closed, making direct APT updates impossible. In such cases, a fresh installation is the only solution. eveng old version download upd
. To find specific older versions (e.g., v2.x Community Edition or older Pro releases): Official Community Mirrors: Community section of the EVE-NG website
Have you successfully downgraded EVE-NG? Share your experience and links to verified old ISOs in the community forums (search: "EVE-NG Legacy Archive"). Stay tuned for next month’s update on QEMU 9.x regressions.
EVE-NG is the successor to UNetLab, built to allow network engineers to emulate real network devices using actual vendor images — from Cisco, Juniper, Huawei, Nokia, Palo Alto, and many others. It runs as a virtual machine (via OVA/OVF packages) or can be installed directly on bare metal using an ISO image. : "EVE-NG社区版跟专业版之间升降级只支持5
When uploading old images to an older EVE-NG ecosystem, always run the classic recovery command via SSH to prevent execution errors: /opt/unetlab/wrappers/unl_wrapper -a fixpermissions Use code with caution.
: Older versions lack the latest security fixes for Golang binaries and Apache, making them vulnerable if connected to the internet.
Run the fixpermissions command after any file or version change. The official repositories for deprecated Ubuntu releases are
A common point of confusion is updating the "nodes" (routers, firewalls) vs. the platform.
For both Community and Professional editions, the standard update procedure uses the APT package manager: