Ubuntu Ethernet driver introduction memo

MSI Z490-A Pro, Ubuntu 20.04 did not recognize the wired LAN, so Driver introduction memo at that time.

1. 1. Kernel version check 　　$ uname -r 5.8.0-38-generic
2. 2. Network chip check 　　$ lspci | grep Ether 03:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8125 2.5GbE Controller (rev 04) Requires Realtek RTL8125 2.5Gbe driver.
3. 3. Check for driver 　　$　ls /lib/modules/5.4.0-54-generic/kernel/drivers/net/ethernet/realtek/ 8139cp.ko 8139too.ko atp.ko r8169.ko Since there is no R8125, it needs to be installed.

4. Download files for RTL8125 driver https://www.realtek.com/en/component/zoo/category/network-interface-controllers-10-100-1000m-gigabit-ethernet-pci-express-software Download Unix (Linux) 2.5G Ethernet LINUX driver r8125 for kernel up to 5.6

5. Creation of RTL8125.ko

6. Unzip the file downloaded in 　$ sudo bash ./autorun.sh Then, it will be created in the directory of 3.

reference

https://qiita.com/bunnyhopper_isolated/items/40aea93b72fb11a0d6a0