vi /etc/netplan/01-network-manager-all.yaml

version: 2
  renderer: networkd
  ethernets:
    ens33:
      addresses: [192.168.0.55/24]
      gateway4: 192.168.0.1
      nameservers:
        addresses: [223.5.5.5, 223.6.6.6] 

sudo netplan apply

22.04

version: 2
  renderer: networkd  #NetworkManager
  ethernets:
    ens33: #更改为ip a里的名称
      dhcp4: false
      addresses: [192.168.0.55/24]
      optional: true
      routes:
        - to: default
          via: 192.168.1.1
      nameservers:
        addresses: [223.5.5.5, 223.6.6.6]