Is there a way to remotely boot into network activated recovery mode? Genuine question, I never looked into it.
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A expensive kvm card, or Pikvm for the home server.
At least for virtual servers, There has to be a cheaper software equivalent, as my cheap VPS allows this (via vnc) with no issues.
Virtual servers (as opposed to hardware workstations or servers) will usually have their "KVM" (Keyboard Video Mouse) built in to the hypervisor control plane. ESXi, Proxmox (KVM - Kernel Virtual Machine), XCP-ng/Citrix XenServer (Xen), Nutanix (KVM-like), and many others all provide access to this. It all comes down to what's configured on the hypervisor OS.
VMs are easy because the video and control feeds are software constructs so you can just hook into what's already there. Hardware (especially workstations) are harder because you don't always have a chip on the motherboard that can tap that data. Servers usually have a dedicated co-computer soldered onto the motherboard to do this, but if there's nothing nailed down to do it, your remote access is limited to what you can plug in. PiKVM is one such plug-in option.
Thank you for the explanation, I really appreciate it. Bystanders will probably too :)
Well said!