Technical
virtiofs and running out of file handles: fix it in Proxmox VMs
virtiofs hits the file handle ceiling fast. Here's a test workload that reproduces it and which workaround actually raises the limit.
Technical
Accidentally Increased the Proxmox Host sda3 to Max: How to Shrink It Without Reinstalling
You accidentally expanded sda3 to max on your Proxmox host. Here's how to shrink it back safely—sda3 is an LVM physical volume, not the root filesystem.
Technical
Proxmox iSCSI Multipath: Setup with TrueNAS and Failover Test
Set up iSCSI multipath on Proxmox with a TrueNAS target. Works with two NICs, failover verified by pulling a cable.
Technical
Proxmox: How to Give a User Access to Only One VM’s Console
Lock a user to a single VM's console with a custom role and ACL path. The exact privileges and the gotcha that's missing from forum replies.
Technical
Container mount point GID mapping works, but no write access
GID mapping looks right but writes still fail? Check the host directory ownership, ACLs, and the order of your idmap entries.
Technical
VM becomes unresponsive during Veeam backup: fix I/O starvation, VSS, and cgroup limits
VM becomes unresponsive during Veeam backup? It's usually I/O starvation from the agent eating disk bandwidth, or VSS freezing the filesystem.
Technical
Proxmox LXC Desktop: Run a Full Linux Desktop in a Container, Not a VM
Proxmox LXC desktop works if you handle GPU and audio right. Here's the setup that actually runs a full Linux desktop in a container without the VM
Technical
Dark theme: selected and hovered grid rows are the same colour (light theme distinguishes them)
The Proxmox dark theme makes selected and hovered grid rows look identical. Here's a CSS override that restores the distinction.
Technical
Proxmox export VM as OVA: a working path and why LXC can’t
Proxmox export VM as OVA isn't in the GUI, but you can build a valid OVA from a VM with qm and tar. LXC containers can't be OVA at all.
Technical
Cannot Connect to Port 8006 to Access Browser GUI: A Shell-First Diagnostic Path
Cannot connect to port 8006 to access browser GUI? Start in the shell: check pveproxy, the network bind, and firewall rules in that order.