Config static IP address on Ubuntu 18.04

Netplan network configuration had been first introduced to Ubuntu 18.04 LTS Bionic Beaver. It is available to all new Ubuntu 18.04 installations.

当前的 netplan 配置文件在 /etc/netplan/ 目录下，查看当前的配置文件：

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

这里的 01-network-manager-all.yaml 桌面版和服务器版的名字不一样

结果如下：

# This file describes the network interfaces available on your system
# For more information, see netplan(5).
network:
  version: 2
  renderer: NetworkManager
  ethernets:
    eno1:
      dhcp4: yes

可以看到默认的 IP 配置是 DHCP，将其改为静态 IP：

# Let NetworkManager manage all devices on this system
network:
  version: 2
  renderer: networkd
  ethernets:
    eno1:
      dhcp4: no
      dhcp6: no
      addresses: [192.168.0.100/24, ]       # IP 地址/子网掩码长度
      gateway4:  192.168.0.1                # 网关
      nameservers:
              addresses: [8.8.8.8, 8.8.4.4] # DNS 服务器

然后是配置生效：

sudo netplan apply

或者：

sudo netplan --debug apply