The 61-Byte File That Took My Server Off the Network
A five-line Wake-on-LAN config, written in July and immediately forgotten, quietly switched off predictable network interface naming. It said nothing for five weeks — until the next reboot, when the machine came up perfectly and had no network at all. Why eth0 appeared where enp3s0 belonged, how to confirm it without rebooting, and the three lines that fix it.
How a “Dead” iPhone Still Shows Up in Find My
Power it off, or let the battery die — your iPhone keeps whispering over Bluetooth, and strangers’ devices carry that whisper home, sealed so even Apple can’t read it. The microwatt engineering and three-lock cryptography behind Apple’s cleverest protocol, with working demos: a relay-network simulator, live in-browser encryption, and a byte-by-byte tour of the beacon itself.
More when something earns the treatment.