Category: Proxmox
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How to Manually Remove an Orphaned Proxmox Node
If you’ve ever removed a storage drive or LVM volume from a Proxmox node, you may have found a “ghost” virtual machine left behind in the web UI, one that can’t be started, migrated, or even deleted through the normal methods. Every time you try, you’re met with an error, and the VM just sits…
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Upgrading Proxmox 8 to Proxmox 9
This guide covers upgrading a Proxmox VE 8 node (based on Debian 12 “Bookworm”) to Proxmox VE 9 (based on Debian 13 “Trixie”) using the command line, which works for both standalone nodes and clusters. Because it upgrades the whole Debian base underneath, this is a major upgrade rather than a routine apt run, so…
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How to Fix “Host Key Verification Failed” Error in Proxmox
The “Host key verification failed” error is a common one when working with SSH-based systems like Proxmox. It happens when the host key SSH gets from the remote server no longer matches the one stored in your known hosts file. Usually this is because the server’s key genuinely changed, after a reinstall, an IP address…
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Converting VirtualBox .vdi to Proxmox VM using VBoxManage
Moving a virtual machine from VirtualBox to Proxmox comes down to converting the VirtualBox .vdi disk into a raw image with VBoxManage, copying it across to your Proxmox server, and attaching it to a new VM. This guide walks through the whole process, using the command line on the Proxmox side since that’s the reliable…