问题描述： 博主是双系统电脑，Windows可以正常使用有线网络，Ubuntu却无法使用，也没有图标问题解决：
- 认为Ubuntu没有安装对应驱动，所以首先寻找设备网卡型号
在终端输入lspci
终端显示
00:00.0 Host bridge: Intel Corporation Device 9b53 (rev 03) 00:01.0 PCI bridge: Intel Corporation Xeon E3-1200 v5/E3-1500 v5/6th Gen Core Processor PCIe Controller (x16) (rev 03) 00:08.0 System peripheral: Intel Corporation Xeon E3-1200 v5/v6 / E3-1500 v5 / 6th/7th Gen Core Processor Gaussian Mixture Model 00:14.0 USB controller: Intel Corporation Device a3af 00:14.2 Signal processing controller: Intel Corporation Device a3b1 00:16.0 Communication controller: Intel Corporation Device a3ba 00:17.0 SATA controller: Intel Corporation Device a382 00:1b.0 PCI bridge: Intel Corporation Device a3eb (rev f0) 00:1c.0 PCI bridge: Intel Corporation Device a393 (rev f0) 00:1f.0 ISA bridge: Intel Corporation Device a3c8 00:1f.2 Memory controller: Intel Corporation Device a3a1 00:1f.3 Audio device: Intel Corporation Device a3f0 00:1f.4 SMBus: Intel Corporation Device a3a3 01:00.0 VGA compatible controller: NVIDIA Corporation Device 1e84 (rev a1) 01:00.1 Audio device: NVIDIA Corporation Device 10f8 (rev a1) 01:00.2 USB controller: NVIDIA Corporation Device 1ad8 (rev a1) 01:00.3 Serial bus controller [0c80]: NVIDIA Corporation Device 1ad9 (rev a1) 02:00.0 Non-Volatile memory controller: Sandisk Corp Device 5009 (rev 01) 03:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. Device 8125 (rev 04)
认准最后一行：Ethernet controller
所以设备名为Realtek Semiconductor Co., Ltd. Device 8125
- 安装网卡Realtek 8125的驱动
git clone https://github.skybox.app/awesometic/realtek-r8125-dkms.git cd realtek-r8125-dkms/ ./autorun.sh
就安装好了
- 检查，在终端输入ip a
可以看到多出来一个enp3s0，至此问题解决
