1、netplan, NetworkManager, systemd-networkd之间的关系

详见netplan, NetworkManager, systemd-networkd简介

2、查看你要设置静态IP的网卡名称

通过ifconfig命令，查看到网卡的名字为enp2s0

xxx@xxx-OptiPlex-3080:~$ ifconfig

enp2s0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.3.88  netmask 255.255.255.0  broadcast 192.168.3.255
        inet6 fe80::72b5:e8ff:fe4b:95a9  prefixlen 64  scopeid 0x20<link>
        ether 70:b5:e8:4b:95:a9  txqueuelen 1000  (以太网)
        RX packets 9409  bytes 794525 (794.5 KB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 6260  bytes 566903 (566.9 KB)
        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  (本地环回)
        RX packets 3160  bytes 358057 (358.0 KB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 3160  bytes 358057 (358.0 KB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

3、通过netplan的yaml文件配置静态IP

使用vi打开/etc/netplan/01-network-manager-all.yaml 配置文件后，增加如下图所示第3到15行。

wangsheng@wangsheng-OptiPlex-3080:~$ sudo vi /etc/netplan/01-network-manager-all.yaml 

4、让静态IP生效

通过以下命令或者重启系统后，网卡enp2s0的静态IP地址就设置好了。

xxx@xxx-OptiPlex-3080:~$ sudo netplan apply