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无线网络接口无法出现

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无线网络接口无法出现

我的设备（操作系统 Ubuntu 20.04）的无线连接无法激活。

  • 这是之前的状态 
    $ ip a sh dev wlp1s0

 4: wlp1s0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default qlen 1000
    link/ether b8:b7:f1:c0:4a:05 brd ff:ff:ff:ff:ff:ff
  • 然后我提出来 
    $ sudo ifconfig wlp1s0 up
  • 当我再次检查时，没有任何变化...... 
    $ ip a sh dev wlp1s0

 4: wlp1s0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default qlen 1000
    link/ether b8:b7:f1:c0:4a:05 brd ff:ff:ff:ff:ff:ff
  • 这是网络规划配置： 
    $ cat /etc/netplan/01-wifi.yaml

 renderer: networkd
 ethernets:
     enp1s0:
         dhcp4: true
     enp2s0:
         dhcp4: true
 version: 2
 wifis:
     wlp1s0:
         optional: true
         access-points:
             "abc":
                 password: "xyz"
         dhcp4: true
  • 这是来自的回应ifconfig 
    enp2s0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 10.111.140.246  netmask 255.255.255.0  broadcast 10.111.140.255
        inet6 fe80::4e38:d5ff:fe11:746e  prefixlen 64  scopeid 0x20<link>
        ether 4c:38:d5:11:74:6e  txqueuelen 1000  (Ethernet)
        RX packets 109968  bytes 126944297 (126.9 MB)
        RX errors 0  dropped 4233  overruns 0  frame 0
        TX packets 61725  bytes 8701147 (8.7 MB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

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 234239  bytes 26630063 (26.6 MB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 234239  bytes 26630063 (26.6 MB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

wlp1s0: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500
        ether b8:b7:f1:c0:4a:05  txqueuelen 1000  (Ethernet)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

我怎样才能连接无线网络？

答案1

的输出ifconfig清楚地表明wlp1s0是up。如果sudo ifconfig wlp1s0 up失败，您将收到通知，无法引发此特定接口。ifconfig [dev] up其本身不负责在引发特定接口后建立连接。

  1. 您需要确保已wpa-supplicant安装才能使用 WPA2 进行身份验证。你可以通过sudo apt install wpa-supplicant

  2. 该文件01-wifi.yaml不是有效的配置文件。为了实现此配置，您需要执行文件sudo netplan generate中的设置，以便为所选渲染器（即您的情况）*.yaml重新生成。networkd

  3. 最后，生成配置后，您需要应用它sudo netplan apply

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