phytool: phytool (Linux PHY register access utility) phytool: phytool: phytool is a small command-line utility for reading and writing phytool: Ethernet PHY registers through the Linux kernel's SIOCGMIIREG phytool: and SIOCSMIIREG interfaces. It allows administrators and phytool: developers to inspect and modify PHY settings for debugging, phytool: diagnostics, and hardware bring-up without requiring custom phytool: applications or kernel modifications. phytool: phytool: Homepage: https://github.com/wkz/phytool