Ubunt 18.04 ip config

18.04 的IP 設定有變動
不在
/etc/network/interfaces

而是在

/etc/netplan/50-cloud-init.yaml

可以由此查找位置

vim /etc/netplan/

vim /etc/netplan/50-cloud-init.yaml

DHCP設定如下：

# 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:

        ens3:

            addresses: []

            dhcp4: true

            optional: true

    version: 2

固定IP 設定則為：

# 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:

        ens3:

            addresses: [192.168.1.220/24, ]

            gateway4: 192.168.1.254

            nameservers:

                 addresses: [192.168.1.254,8.8.4.4]

            dhcp4: false

            optional: true

    version: 2

設定完成後套用可藉由Debug確認設定有無錯誤

sudo netplan --debug apply

#apply 為套用

則如果無誤套用此設定。