Hardware
Turn a $40 OptiPlex into a Proxmox Home Lab
Old Dell desktops are everywhere. Here's how to wipe one and run a full virtualization stack.
Firmware
Flashing Coreboot on a ThinkPad X230 Without Bricking It
A fourteen-year-old laptop, an open-source BIOS, and a couple of hours with a clip. Here is the procedure that has worked for me twelve times running.