Implemented by Intel developer Mika Westerberg last year during the development of the Linux 4.15 kernel series, Thunderbolt networking arrived for Linux-based operating systems to enable peer-to-peer (P2P) network connections where you connect two computers directly via a certified Thunderbolt cable to transfer files. But while the implementation was there in the Linux kernel, the userspace bits were missing to make Thunderbolt networking work on a standard installation of a GNU/Linux distribution. By adding a new udev rule in the NetworkManager the two developers managed to load the thunderbolt-net kernel module.