I've been running a web and mail server off an old Dell 745. Doing kernel upgrades yesterday and it failed to reboot (power switch never came up to green again)
Fortunately(?) there was another 745 shell on the shelf. I transferred the hard drives and RAM, changed the BIOS config, changed the udev and network config files and it's back online.
The social network of the future: No ads, no corporate surveillance, ethical design, and decentralization! Own your data with Mastodon!