突然发现我的 Ubuntu 22.04 里没有有线连接的配置项，本文记录解决方案。
问题复现
没有有线连接配置项，插网线也不行。
解决方案
输入命令：
检查 network 的状态，当前出问题的输出为：
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| *-network:1 UNCLAIMED
description: Ethernet controller
product: Ethernet Connection (17) I219-LM
vendor: Intel Corporation
physical id: 1f.6
bus info: pci@0000:00:1f.6
version: 11
width: 32 bits
clock: 33MHz
capabilities: pm msi cap_list
configuration: latency=0
resources: memory:75280000-7529ffff
|
UNCLAIMED 可以理解为未激活的状态，另一种异常为 DISABLED
DISABLED
如果遇到 DISABLED 状态：
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| ls /etc/NetworkManager/conf.d/
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| sudo touch /etc/NetworkManager/conf.d/10-globally-managed-devices.conf
sudo systemctl restart NetworkManager
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问题解决！
UNCLAIMED
修改NetworkManager配置
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| sudo vi /etc/NetworkManager/NetworkManager.conf
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将managed=false修改为managed=true，保存并退出
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| sudo service NetworkManager stop
sudo rm /var/lib/NetworkManager/NetworkManager.state
sudo service NetworkManager start
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重启 Ubuntu ，问题解决。
解决后
重新查看 sudo lshw -c Network 命令：
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| *-network:1
description: Ethernet interface
product: Ethernet Connection (17) I219-LM
vendor: Intel Corporation
physical id: 1f.6
bus info: pci@0000:00:1f.6
logical name: enp0s31f6
version: 11
serial: 4c:d7:17:97:c2:7b
size: 1Gbit/s
capacity: 1Gbit/s
width: 32 bits
clock: 33MHz
capabilities: pm msi bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=e1000e driverversion=6.5.0-28-generic duplex=full firmware=2.3-4 latency=0 link=yes multicast=yes port=twisted pair speed=1Gbit/s
resources: irq:145 memory:75280000-7529ffff
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出现了 Wired 选项
参考资料
文章链接：
https://www.zywvvd.com/notes/system/linux/ubuntu-wired-conn-lost/ubuntu-wired-conn-lost/
