静态版本：ubuntu20.04设置静态ip地址(包括不同版本)

sudo vim /etc/netplan/01-network-manager-all.yaml

sudo netplan --debug apply

$ cat /etc/network/interfaces
 auto lo
 iface lo inet loopback
 
 auto eth0
 iface eth0 inet static
 address 20.20.20.102
 netmask 255.255.255.0
 gateway 20.20.20.102
 dns-nameservers 20.20.20.2

$ cat /etc/network/interfaces
 auto lo
 iface lo inet loopback
 
 auto eth0
 iface eth0 inet static
 address 20.20.20.102
 netmask 255.255.255.0
 gateway 20.20.20.102
 dns-nameservers 20.20.20.2
 
$ cat /etc/NetworkManager/NetworkManager.conf
 [main]
 plugins=ifupdown,keyfile,ofono
 dns=dnsmasq
 
 no-auto-default=00:0C:29:D7:43:29,
 
 [ifupdown]
 managed=true

$ cat /etc/network/interfaces
 auto lo
 iface lo inet loopback
 
 auto ens32
 iface ens32 inet static
 address 20.20.20.102
 netmask 255.255.255.0
 gateway 20.20.20.102
 
$ cat /etc/NetworkManager/NetworkManager.conf
 [main]
 plugins=ifupdown,keyfile,ofono
 dns=dnsmasq
 
 no-auto-default=00:0C:29:D7:43:29,
 
 [ifupdown]
 managed=true
 
$ cat /etc/resolv.conf
 nameserver 127.0.1.1
 nameserver 20.20.20.2

$ ip a / ifconfig

$ sudo cp /etc/netplan/*.yaml /etc/netplan/网卡名.yaml

# Let NetworkManager manage all devices on this system
network:
 version: 2
 renderer: NetworkManager
 ethernets:
 网卡名:
  dhcp4: no
  addresses: [ip/prefix]
  gateway4: gateway
  nameservers:
  addresses: [dns]

$ sudo netplan apply

$ ip a / ifconfig