Ubuntu 系统不小心删掉一些库, 导致无法使用有线上网,最后排查问题,发现有线网卡被关掉了,在这记录开启有线网卡的方法。
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一、查询网卡状态
使用 lshw -C network
得到下列信息, 可以发现以太网接口(Ethernet interface) 一直处于关闭(DISABLED)状态。
WARNING: you should run this program as super-user.
*-network DISABLED
description: Ethernet interface
product: 82579LM Gigabit Network Connection
vendor: Intel Corporation
physical id: 19
bus info: pci@0000:00:19.0
logical name: enp0s25
version: 04
serial: 00:21:cc:cd:28:8f
capacity: 1Gbit/s
width: 32 bits
clock: 33MHz
capabilities: bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=e1000e driverversion=3.2.6-k firmware=0.13-3 latency=0 link=no multicast=yes port=twisted pair
resources: irq:28 memory:f2500000-f251ffff memory:f253b000-f253bfff ioport:6080(size=32)
二、编辑配置文件
vim /usr/lib/NetworkManager/conf.d/10-globally-managed-devices.conf
把原来的
[keyfile]
unmanaged-devices=*,except:type:wifi,except:type:wwan
修改为
[keyfile]
unmanaged-devices=*,except:type:ethernet,except:type:wifi,except:type:wwan
最后使用 sudo service network-manager restart
重启服务即可。