/etc/netplan/下面有个YAML配置文件

    1. ubuntu@ubuntu:~$ cat /etc/netplan/50-cloud-init.yaml
    3. network:
    4.     ethernets:
    5.         eth0:
    6.             dhcp4: true
    7.             optional: true
    8.     version: 2
    9.     wifis:
    10.             wlan0:
    11.                     dhcp4: true
    12.                     access-points:
    13.                             "你的wifi的ssid":
    14.                                     password: "你的密码"
    1. sudo netplan try
    3. sudo netplan apply
    4. sudo reboot

    拔掉网线 就好了