ubuntu16.04 stepping pit notes--Ethernet link

I installed ubuntu16.04 to prepare for further in-depth learning. After installing linux, my Ethernet wired connection always dropped, and it disconnected every 10 seconds, which was extremely annoying. I have tried many solutions on the Internet, depending on the device, and put the blog I found that can solve my problem (forgot to take a screenshot, just put the solution): 1. How to set a static ip
under ubuntu:
(https:// blog.csdn.net/xiongchun11/article/details/53928149)
2. If the above methods cannot solve the problem, please refer to changing the driver. The Ubuntu version is 16.04 LTS, and the default driver is r8169, which needs to be replaced with r8168. (https://blog.csdn.net/The_MADAO/article/details/52494872?locationNum=7&fps=1)
Please be careful when changing the driver. I checked the relevant driver information of other computers ubuntu, which is also r8169, and there is no problem with networking. .