I would like to about using iPhone Tethering on ArchLinux
first one, Install package.

$ pacman -S usbmuxd libimobiledevice ifuse

Next, load module

$ modprobe ipheth

Please setting connect network with USB on your iPhone when loading completed. then, connecting your PC to iPhone. Although Ethernet devices are recognized at this stage, they can’t connect to the Internet.
The ipheth module operate when iPhone file system is mounted by ifuse

$  ifuse /path/to/mountpoint

If you didn’t set automatically mounted when iPhone connected, You need manually mount.

$  ifuse /path/to/mountpoint

Check whether it is displayed on the network. Set if it is displayed.

$ ip link
$ ip link set < your iPhone's network>