Ubuntu Server 20.04 Static IP Command Line: A Comprehensive Guide

🚀 Introduction

Welcome to our comprehensive guide on Ubuntu Server 20.04 Static IP Command Line! In this day and age, the internet has become an essential part of our lives. Whether in business or personal life, having a stable internet connection is vital. One of the ways to ensure an uninterrupted internet connection is by setting a static IP on your server. Static IPs allow your network devices to communicate with each other more efficiently and securely. In this article, we’ll walk you through the process of setting up a static IP on your Ubuntu Server 20.04 through Command Line Interface (CLI).

What is Ubuntu Server 20.04?

Ubuntu Server 20.04, also known as Focal Fossa, is the latest Long Term Support (LTS) release of the Ubuntu Operating System. It is a free and open-source operating system that runs on servers, enabling you to handle heavy workloads, and providing a stable, secure, and scalable platform. Ubuntu Server is widely used on cloud platforms such as Amazon Web Services (AWS) and Microsoft Azure.

What is a Static IP?

An IP (Internet Protocol) address is a unique numerical identifier assigned to your network device, allowing it to communicate with other devices on the internet. A Static IP, as opposed to a Dynamic IP, is an IP address that does not change. A Static IP helps you to maintain a reliable and consistent internet connection. When you set up a Static IP on your Ubuntu Server, you prevent the server from automatically assigning a different IP address every time you restart it.

Why Set Up A Static IP?

There are several reasons why you might want to set up a Static IP, including:

Benefits	Drawbacks
Improved network stability	Incompatible with certain network configurations
Easier remote access	Requires manual configuration
Better security	Can cause IP address conflicts

🔧 How to Set Up a Static IP Address on Ubuntu Server 20.04 Command Line Interface

Prerequisites

Before we begin, you need to have the following:

• An Ubuntu Server 20.04 running on your machine
• Superuser access to the server (either by being logged in as root or by using the sudo command)
• Your current IP address and default gateway

Step-by-step Instructions

Here are the steps to follow when setting up a Static IP on Ubuntu Server 20.04:

Step 1: Identify Network Interface

First, you need to identify the network interface that you want to set up a Static IP address for. The most common network interface names in Ubuntu are eth0 and enp3s0. To identify your network interface, run the following command:

ip a

Step 2: Backup Network Configuration File

Before making any changes, it is crucial to back up the network configuration file in case you need to revert the changes. Use the following command to create a backup:

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

Step 3: Edit Network Configuration File

Next, you need to edit the network configuration file. Use the following command to open the file:

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

Make sure the file looks like the following:

network:ethernets:eth0:addresses:- 192.168.1.100/24gateway4: 192.168.1.1nameservers:addresses: [8.8.8.8, 8.8.4.4]version: 2

Step 4: Save and Apply Changes

After editing the file, save the changes and apply them using the following command:

sudo netplan apply

Step 5: Verify Changes

Finally, verify that you have successfully set up a Static IP using the following command:

ip a

If the output shows the new IP address, congratulations! You have successfully set up a Static IP on your Ubuntu Server 20.04!

❓ FAQs

Q1: Why does my Static IP address not work?

A: There could be several reasons why your Static IP address is not working, including incorrect network settings or IP address conflicts. Ensure that you have set up your Static IP correctly and that there are no conflicting IP addresses on the network.

Q2: How do I reset my network settings to default?

A: To reset your network settings to default, use the following command:

sudo netplan generate

Q3: How do I configure multiple IP addresses?

A: To configure multiple IP addresses, add another address line for each IP address on the network interface configuration file:

addresses:- 192.168.1.100/24- 192.168.1.101/24

Q4: Is it possible to configure a static IP address through the GUI?

A: Yes, it is possible to configure a static IP address through the GUI. However, it is recommended to use the Command Line Interface for better control and customization.

Q5: How do I check my default gateway?

A: You can check your default gateway by using the following command:

ip route | grep default

Q6: What is the difference between a Static IP and a Dynamic IP?

A: A Static IP is an IP address that does not change, while a Dynamic IP is an IP address assigned automatically by a DHCP (Dynamic Host Configuration Protocol) server.

Q7: Can I assign a Static IP to a DHCP network?

A: Yes, you can assign a Static IP to a DHCP network. However, ensure that your Static IP address is not in the DHCP server’s scope to avoid IP address conflicts.

👍 Conclusion

Congratulations! You now know how to set up a Static IP on your Ubuntu Server 20.04 through Command Line Interface. With this guide, you can customize and optimize your Ubuntu Server’s networking settings for better stability, security, and remote access. Remember to back up your network configuration file before making any changes and test your Static IP to ensure that it is working correctly. If you have any questions or concerns, feel free to contact us.

⚠️ Closing/Disclaimer

This guide is for educational purposes only and does not constitute a professional recommendation or technical advice. Use this guide at your own risk, and ensure that you have proper knowledge and understanding of the commands and procedures before executing them. We are not responsible for any loss or damage caused by the use of this guide.

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