root@ubuntu-MesosMaster-Marathon:~# cat /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.
# 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:
    ethernets:
        ens33:
            addresses: [
 
192.168.115.148/24]
            gateway4: 192.168.115.2
            dhcp4: false
            nameservers:
                    addresses: [192.168.115.2]
    version: 2

看文件格式就知道這個文件嚴格遵守yaml語法格式，需要 使用root權限，設置好之後可以使用如下命令進行即時生效

root@ubuntu-MesosMaster-Marathon:~# netplan apply                       
root@ubuntu
 
-MesosMaster-Marathon:~# ping baidu.com
PING baidu.com (220.181.57.216) 56(84) bytes of data.
64 bytes from 220.181.57.216 (220.181.57.216): icmp_seq=1 ttl=128 time=25.7 ms

[operator]Ubuntu server 18 設置靜態IP