Ubuntu 22.04 静态 IP 配置

This guide explains how to configure a static IP address on Ubuntu 22.04 using Netplan.

1. Check Current Network Status

Before making changes, identify your network interface name and current configuration.

# Check IP address and subnet mask
ip addr

# Check default gateway
ip route

# Check DNS servers
resolvectl status

2. Configure Netplan

Netplan configuration files are located in /etc/netplan/. The default file is usually named 00-installer-config.yaml or similar.

Backup the existing configuration:

sudo cp /etc/netplan/00-installer-config.yaml /etc/netplan/00-installer-config.yaml.bak

Edit the configuration file:

sudo vim /etc/netplan/00-installer-config.yaml

Default Configuration (DHCP):

# This is the network config written by 'subiquity'
network:
  ethernets:
    ens160:
      dhcp4: true
  version: 2

Static IP Configuration:

Modify the file to look like this (replace ens160, IP addresses, and gateway with your own values):

# This is the network config written by 'subiquity'
network:
  ethernets:
    ens160:
      dhcp4: false
      addresses:
        - 192.168.1.2/24
      routes:
        - to: default
          via: 192.168.1.1
      nameservers:
        addresses: [1.1.1.1, 8.8.8.8]
  version: 2

3. Apply Configuration

Apply the changes using Netplan.

sudo netplan apply

If there are no errors, verify the new IP address:

ip addr show ens160