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Configuring the network on an Ubuntu VPS server is crucial for ensuring the server's availability on the Internet. This guide outlines the key steps for network setup on a VPS server, including configuring a static IP address, setting up DNS, and performing basic network diagnostics.

Step 1: Connect to the Server

The first step is to connect to your VPS server via SSH. Use the following command:

Here, username is your username on the server, and your_server_ip is the IP address of your server.

Step 2: Check Current Network Settings

Before making changes, it's useful to check the current network settings. Execute the following command:

This command will display the current network interfaces and their IP addresses.

Step 3: Configure a Static IP Address

To set up a static IP address on Ubuntu, you'll use the configuration file /etc/netplan/*.yaml. Open this file for editing (the filename may vary, e.g., 01-netcfg.yaml):

Here's an example configuration for a static IP address:

After making changes, save the file and apply the new configuration:

Step 4: Configure DNS Servers

To change DNS server settings, open the /etc/netplan/*.yaml file and add or modify the nameservers section as shown in the example above. After changing the configuration, apply it:

Step 5: Diagnose Network Issues

To troubleshoot network issues, use the following commands:

• ping: Check the availability of a host.

  bash

  Копировать код

  ping 8.8.8.8

• traceroute: Trace the route to a host.

  bash

  Копировать код

  traceroute google.com

• nslookup: Check DNS queries.

  bash

  Копировать код

  nslookup google.com

• netstat: View network connections.

  bash

  Копировать код

  netstat -tuln

Configuring the network on an Ubuntu VPS involves several key steps, from setting up a static IP address to configuring DNS and troubleshooting network issues. These steps help ensure the stability and availability of your server on the Internet.