Fly Kan 2.5G USB Network Card on Ubuntu 20.04.1 LTS

Fly Kan started their 2.5G USB Network Device (CUG3125 & CUG025). They works well with Realtek's official driver package. The 2 2.5G USB Network Cards supports 2.5G/1G/100Mbps/10Mbps speed-mode. But there requires 2.5G Network swtich as well.

The installation is a rather easy job. However the configuration requires professional Linux background.

Driver installation requires two commands as "sudo'.
sudo depmod -a
sudo update-initramfs -u
Then can be verified bu ls-usb