停电后不得上网

Question

你好，昨天我的服务器出现停电，运行UbuntuServer18.04.4LTS。断电后，我意识到我什么也不能平，所以我立即检查了网络适配器，它出现在使用#lspci的ubuntu上。我走进bios，注意到网络适配器正在闪烁，里面有以太网电缆，但当我开机进入ubuntu时，它就停止了。我已经尝试过重置bios，使用不同的端口和以太网电缆。其他地方的互联网运作都很好。我一直在努力解决这个问题，所以任何关于如何解决这个问题的建议都是非常感谢的！

我的网络拓扑是一台连接到网络交换的计算机，它直接连接到路由器。开关和电缆已被检查为故障点。

编辑:当引导到相同硬件的Ubuntu时，互联网可以正常工作。

带有车载以太网的

      *-network DISABLED
       description: Ethernet interface
       product: I211 Gigabit Network Connection
       vendor: Intel Corporation
       physical id: 0
       bus info: pci@0000:07:00.0
       logical name: enp7s0
       version: 03
       serial: b4:2e:99:37:96:24
       capacity: 1Gbit/s
       width: 32 bits
       clock: 33MHz
       capabilities: pm msi msix pciexpress bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
       configuration: autonegotiation=on broadcast=yes driver=igb driverversion=5.4.0-k firmware=0. 6-1 latency=0 link=no multicast=yes port=twisted pair
       resources: irq:38 memory:f7400000-f741ffff ioport:f000(size=32) memory:f7420000-f7423fff
  *-network:0
       description: Ethernet interface
       physical id: 1
       logical name: veth8ccdf40
       serial: 96:3c:c7:77:5b:8c
       size: 10Gbit/s
       capabilities: ethernet physical
       configuration: autonegotiation=off broadcast=yes driver=veth driverversion=1.0 duplex=full link=yes multicast=yes port=twisted pair speed=10Gbit/s
  *-network:1
       description: Ethernet interface
       physical id: 2
       logical name: vethe78e395
       serial: 8a:79:ec:c3:1f:3e
       size: 10Gbit/s
       capabilities: ethernet physical
       configuration: autonegotiation=off broadcast=yes driver=veth driverversion=1.0 duplex=full link=yes multicast=yes port=twisted pair speed=10Gbit/s
  *-network:2
       description: Ethernet interface
       physical id: 3
       logical name: veth5d2f953
       serial: 96:42:dd:ae:ae:52
       size: 10Gbit/s
       capabilities: ethernet physical
       configuration: autonegotiation=off broadcast=yes driver=veth driverversion=1.0 duplex=full link=yes multicast=yes port=twisted pair speed=10Gbit/s
  *-network:3
       description: Ethernet interface
       physical id: 4
       logical name: veth4f8fb2c
       serial: de:1d:a0:a5:de:a8
       size: 10Gbit/s
       capabilities: ethernet physical
       configuration: autonegotiation=off broadcast=yes driver=veth driverversion=1.0 duplex=full link=yes multicast=yes port=twisted pair speed=10Gbit/s
  *-network:4
       description: Ethernet interface
       physical id: 5
       logical name: docker0
       serial: 02:42:2e:f0:65:e4
       capabilities: ethernet physical
       configuration: broadcast=yes driver=bridge driverversion=2.3 firmware=N/A ip=172.17.0.1 link=yes multicast=yes
  *-network:5
       description: Ethernet interface
       physical id: 6
       logical name: veth79ceca4
       serial: a2:b9:77:11:57:7c
       size: 10Gbit/s
       capabilities: ethernet physical
       configuration: autonegotiation=off broadcast=yes driver=veth driverversion=1.0 duplex=full link=yes multicast=yes port=twisted pair speed=10Gbit/s
  *-network:6
       description: Ethernet interface
       physical id: 7
       logical name: veth2ffa2a6
       serial: d2:b6:bd:e0:a6:c0
       size: 10Gbit/s
       capabilities: ethernet physical
       configuration: autonegotiation=off broadcast=yes driver=veth driverversion=1.0 duplex=full link=yes multicast=yes port=twisted pair speed=10Gbit/s
  *-network:7
       description: Ethernet interface
       physical id: 8
       logical name: veth902f706
       serial: 62:b7:aa:97:13:2c
       size: 10Gbit/s
       capabilities: ethernet physical
       configuration: autonegotiation=off broadcast=yes driver=veth driverversion=1.0 duplex=full link=yes multicast=yes port=twisted pair speed=10Gbit/s
  *-network:8
       description: Ethernet interface
       physical id: 9
       logical name: vethf5875fa
       serial: 9e:47:b1:e2:c6:c8
       size: 10Gbit/s
       capabilities: ethernet physical
       configuration: autonegotiation=off broadcast=yes driver=veth driverversion=1.0 duplex=full link=yes multicast=yes port=twisted pair speed=10Gbit/s

带以太网适配器的

  *-network DISABLED
       description: Ethernet interface
       product: I211 Gigabit Network Connection
       vendor: Intel Corporation
       physical id: 0
       bus info: pci@0000:07:00.0
       logical name: enp7s0
       version: 03
       serial: b4:2e:99:37:96:24
       capacity: 1Gbit/s
       width: 32 bits
       clock: 33MHz
       capabilities: pm msi msix pciexpress bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
       configuration: autonegotiation=on broadcast=yes driver=igb driverversion=5.4.0-k firmware=0. 6-1 latency=0 link=no multicast=yes port=twisted pair
       resources: irq:38 memory:f7400000-f741ffff ioport:f000(size=32) memory:f7420000-f7423fff
  *-network:0
       description: Ethernet interface
       physical id: 1
       logical name: veth8ccdf40
       serial: 96:3c:c7:77:5b:8c
       size: 10Gbit/s
       capabilities: ethernet physical
       configuration: autonegotiation=off broadcast=yes driver=veth driverversion=1.0 duplex=full link=yes multicast=yes port=twisted pair speed=10Gbit/s
  *-network:1 DISABLED
       description: Ethernet interface
       physical id: 2
       logical name: enxa0cec819afb3
       serial: a0:ce:c8:19:af:b3
       size: 1Gbit/s
       capacity: 1Gbit/s
       capabilities: ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation
       configuration: autonegotiation=on broadcast=yes driver=r8152 driverversion=v1.09.9 duplex=full link=no multicast=yes port=MII speed=1Gbit/s
  *-network:2
       description: Ethernet interface
       physical id: 3
       logical name: vethe78e395
       serial: 8a:79:ec:c3:1f:3e
       size: 10Gbit/s
       capabilities: ethernet physical
       configuration: autonegotiation=off broadcast=yes driver=veth driverversion=1.0 duplex=full link=yes multicast=yes port=twisted pair speed=10Gbit/s
  *-network:3
       description: Ethernet interface
       physical id: 4
       logical name: veth5d2f953
       serial: 96:42:dd:ae:ae:52
       size: 10Gbit/s
       capabilities: ethernet physical
       configuration: autonegotiation=off broadcast=yes driver=veth driverversion=1.0 duplex=full link=yes multicast=yes port=twisted pair speed=10Gbit/s
  *-network:4
       description: Ethernet interface
       physical id: 5
       logical name: veth322071d
       serial: 66:3c:29:3d:31:6a
       size: 10Gbit/s
       capabilities: ethernet physical
       configuration: autonegotiation=off broadcast=yes driver=veth driverversion=1.0 duplex=full link=yes multicast=yes port=twisted pair speed=10Gbit/s
  *-network:5
       description: Ethernet interface
       physical id: 6
       logical name: docker0
       serial: 02:42:2e:f0:65:e4
       capabilities: ethernet physical
       configuration: broadcast=yes driver=bridge driverversion=2.3 firmware=N/A ip=172.17.0.1 link=yes multicast=yes
  *-network:6
       description: Ethernet interface
       physical id: 7
       logical name: veth79ceca4
       serial: a2:b9:77:11:57:7c
       size: 10Gbit/s
       capabilities: ethernet physical
       configuration: autonegotiation=off broadcast=yes driver=veth driverversion=1.0 duplex=full link=yes multicast=yes port=twisted pair speed=10Gbit/s
  *-network:7
       description: Ethernet interface
       physical id: 8
       logical name: veth2ffa2a6
       serial: d2:b6:bd:e0:a6:c0
       size: 10Gbit/s
       capabilities: ethernet physical
       configuration: autonegotiation=off broadcast=yes driver=veth driverversion=1.0 duplex=full link=yes multicast=yes port=twisted pair speed=10Gbit/s
  *-network:8
       description: Ethernet interface
       physical id: 9
       logical name: veth902f706
       serial: 62:b7:aa:97:13:2c
       size: 10Gbit/s
       capabilities: ethernet physical
       configuration: autonegotiation=off broadcast=yes driver=veth driverversion=1.0 duplex=full link=yes multicast=yes port=twisted pair speed=10Gbit/s
  *-network:9
       description: Ethernet interface
       physical id: a
       logical name: vethf5875fa
       serial: 9e:47:b1:e2:c6:c8
       size: 10Gbit/s
       capabilities: ethernet physical
       configuration: autonegotiation=off broadcast=yes driver=veth driverversion=1.0 duplex=full link=yes multicast=yes port=twisted pair speed=10Gbit/s

Netplan

    # This file describes the network interfaces available on your system
# For more information, see netplan(5).
network:
  version: 2
  renderer: networkd
  ethernets:
    enp6s0:
      dhcp4: yes

Answer 1

我已经设置了一个/etc/netplan/*..yaml文件，它将驱动您的车载以太网或USB以太网适配器。一次只能连接一个。先试试星上以太网。如果你愿意的话，试试USB以太网适配器。这两种方法现在都应该起作用了。

将/etc/netplan/*..yaml文件改为.保持缩进，间距，没有标签，就像你看到的那样.

# This file describes the network interfaces available on your system
# For more information, see netplan(5).
network:
  version: 2
  renderer: networkd
  ethernets:
    enp7s0:
      dhcp4: true
      optional: true
    enxa0cec819afb3:
      dhcp4: true
      optional: true

sudo netplan --debug generate #生成配置文件

sudo netplan apply #应用新配置

reboot #这现在是可选的，但是我们以后会想做的