配置wifi

打开并编辑/etc/netplan/目录下的网络配置文件：

sudo gedit /etc/netplan/50-cloud-init.yaml

# This file is generated from information provided by the datasource.  Changes
# to it will not persist across an instance reboot.  To disable cloud-init's
# network configuration capabilities, write a file
# /etc/cloud/cloud.cfg.d/99-disable-network-config.cfg with the following:
# network: {config: disabled}
network:
  version: 2
  wifis:
    wlan0:
      dhcp4: true
      optional: true
      access-points:  # 所有WiFi热点都放在这个节点下
        "wifi1":
          password: "password1"
        "wifi2":
          password: "password2"
        "wifi3":
          password: "password3"

保存后，终端运行命令：

sudo netplan try

然后按ENTER键确认。