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Ubuntu 上有 WiFi，但有线连接不行

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Ubuntu 上有 WiFi，但有线连接不行

我在电脑上安装了 Ubuntu（服务器），在安装过程中，我将其连接到 wifi，它运行正常。但是，我尝试将其移动到有线连接，但它似乎无法识别该连接。

sudo netplan -debug generate 没有返回任何错误。

我知道连接应该可以工作。当连接到我的笔记本电脑时，它可以工作，并且计算机背面的以太网端口上的指示灯在计算机启动时闪烁，但在启动完成后熄灭。

lshw 返回：

 *-network DISABLED
            description: Ethernet interface
            product: 88E8056 PCI-E Gigabit Ethernet Controller
            vendor: Marvell Technology Group Ltd.
            physical id: 0
            bus info: pci@0000:02:00.0
            logical name: ens33
            version: 14
            serial: 00:21:97:0f:26:21
            capacity: 1Gbit/s
            width: 64 bits
            clock: 33MHz
            capabilities: bus_master cap_list rom ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation
            configuration: autonegotiation=on broadcast=yes driver=sky2 driverversion=1.30 latency=0 link=no multicast=yes port=twisted pair
            resources: irq:26 memory:feafc000-feafffff ioport:e800(size=256) memory:feac0000-feadffff

ifconfig 返回：

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
    inet 127.0.0.1  netmask 255.0.0.0
    inet6 ::1  prefixlen 128  scopeid 0x10<host>
    loop  txqueuelen 1000  (Local Loopback)
    RX packets 1716  bytes 215593 (215.5 KB)
    RX errors 0  dropped 0  overruns 0  frame 0
    TX packets 1716  bytes 215593 (215.5 KB)
    TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0 
wlp3s1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
    inet 192.168.1.33  netmask 255.255.255.0  broadcast 192.168.1.255
    inet6 fe80::215:e9ff:fe4c:261  prefixlen 64  scopeid 0x20<link>
    ether 00:15:e9:4c:02:61  txqueuelen 1000  (Ethernet)
    RX packets 13520  bytes 4311598 (4.3 MB)
    RX errors 0  dropped 998  overruns 0  frame 0
    TX packets 8205  bytes 5869540 (5.8 MB)
    TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

IP路由：

default via 192.168.1.1 dev wlp3s1 proto dhcp src 192.168.1.33 metric 600
192.168.1.0/24 dev wlp3s1 proto kernel scope link src 192.168.1.33
192.168.1.1 dev wlp3s1 proto dhcp scope link src 192.168.1.33 metric 600

猫/etc/netplan/*.yaml：

# This file describes the network interfaces available on your system
# For more information, see netplan(5).
network:
version: 2 <--indentation in entire script is incorrect
renderer: networkd
wifis:
  wlp3s1:
     dhcp4: yes
     access-points:
       3MightyMen:                                                                                      
          password: 3346993030
ethernets:
  en33:  <--wrong, should be ens33:
    dhcp3: true <--wrong, should be dhcp4:

答案1

您的 /etc/neplan .yaml 文件应该看起来像这样...这将启用您的以太网设备...

network:
  version: 2
  renderer: networkd
    wifis:
      wlp3s1:
        dhcp4: yes
        dhcp6: no
        access-points:
          "3MightyMen":                                                                                      
          password: "3346993030"
    ethernets:
      ens33:
        dhcp4: yes
        dhcp6: no
# for a fixed IP, comment out the above line, (dhcp4: true),
# and uncomment addresses: and gateway4: lines below.
# to specify DNS nameservers, uncomment last three lines.
#       addresses: [192.168.1.20/24]
#       gateway4: 192.168.1.1
#       nameservers:
#         search: [mydomain, otherdomain]
#         addresses: [192.168.1.1, 1.1.1.1]

在terminal...

sudo netplan --debug generate# 生成配置文件

sudo netplan apply# 应用当前配置

reboot# 重启并确认网络正常运行

后注：参见https://netplan.io/examples更多示例

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