uBuntu Netplan網路卡設定

前言

當Ubuntu無法使用GUI設定網路時，可以利用netplan設定檔，從Command進行修改。

1. 進入netplan .yaml的設定檔

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

2. 進入設定檔

原始生成的檔案，通常內部會預設DHCP。

# This file is generated from information provided by the datasource.  Changes
# to it will not persist across an instance reboot.  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:
        eth0:
            dhcp4: no
    version: 2

3. 修改設定檔

# This file is generated from information provided by the datasource.  Changes
# to it will not persist across an instance reboot.  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:
        eth0:
            dhcp4: off
            addresses: [192.168.1.189/24]
            gateway4: 192.168.1.1
            nameservers:
                addresses: [8.8.8.8]
    renderer: networkd
    version: 2

4. 套用設定

執行以下指令，這時候通常會斷線個幾秒鐘，之後終端機上就會出現一個倒數計時，代表設定正確。這時候再按下 Enter 就會保存設定。 該用途用於，若設定錯誤，timeout後會自動恢復原本設定。

sudo netplan try

5. 套用設定

執行以下指令，會強制設定，建議在確定設定無誤後再執行。

sudo netplan apply