How to find my IP address on Ubuntu Linux

Finding your IP address on Ubuntu can be crucial for various networking tasks, such as setting up a server, troubleshooting connectivity issues, or simply ensuring your network’s security. Ubuntu, with its powerful command-line interface and graphical user interface options, offers multiple methods to discover your machine’s IP address. Whether you’re a seasoned system administrator or a curious novice, understanding how to locate your IP address is a valuable skill in the digital age. Keep in mind that your internal IP address is different from your system’s external IP.
In this tutorial you will learn:

• How to use simple command-line tools to find your IP address
• The method to check your IP via Ubuntu’s graphical user interface (for desktop users)
• Where to locate your IP address in system configuration files (for static IP configurations)

Software Requirements and Linux Command Line Conventions

Category	Requirements, Conventions or Software Version Used
System	Any recent version of Ubuntu Desktop or Server: 16.04,18.04,20.04,22.04,24.04
Software	Standard Ubuntu installation
Other	Terminal access for command-line methods, GUI access for desktop method
Conventions	# – requires given linux commands to be executed with root privileges either directly as a root user or by use of sudo command $ – requires given linux commands to be executed as a regular non-privileged user

Discovering Your IP Address on Ubuntu

There are several ways to find your IP address on Ubuntu. Depending on whether you are using a desktop or server version, you might prefer a graphical or command-line method. Below are the most common and straightforward ways to check your IP address.

1. Using the ip Command: A quick way to find your IP address

   $ ip a

   Using the ip a command in Ubuntu’s terminal provides a detailed enumeration of all available network interfaces on your system, along with their corresponding IP addresses. When you execute this command, it will present a list, where each entry represents a different network interface. For wired connections, the relevant interface is often labeled as enp1s0 or eth0, whereas for wireless connections, it is typically identified as wlan0. In the output, alongside the interface name, you’ll find the inet line, which includes the IP address assigned to that interface.

   This address is what enables your machine to communicate with other devices on the network or the internet. For more advanced network configurations, there may also be secondary addresses, virtual interfaces, or tunnel interfaces listed. Each of these will be accompanied by their own IP addresses under their respective sections in the command’s output.

   

2. Querying Network Manager: Get detailed network information

   $ nmcli device show

   This command not only reveals the IP addresses but also provides extensive network configuration details, such as the gateway and DNS servers for each interface. It even offers insight into IPv6 configurations when they are set up, making it a comprehensive tool for network management and diagnostics.

   

3. Checking Hostname: A simple command to list your IP address

   $ hostname -I

   This command outputs all the network IP addresses associated with your machine.

   

4. Inspecting Configuration Files: For static IP configurations, check the relevant network configuration file.

   In modern Ubuntu versions, network settings are managed with netplan, located in /etc/netplan/. Here, you may encounter files like 01-netcfg.yaml,50-cloud-init.yaml or 00-installer-config.yaml, which are used to define network interfaces in a user-friendly YAML format. This system allows for the implementation of advanced network configurations and seamlessly integrates with Ubuntu’s network management services.

   Conversely, older Ubuntu systems rely on the /etc/network/interfaces file for network configuration. It’s a more traditional and less intuitive method, where you’d typically find settings for static IP addresses and network interfaces named eth0, wlan0, and so on. This method is familiar to those accustomed to Unix and Linux networking practices, and knowledge of it is useful for managing legacy systems.

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5. Using networkctl: Another method for systemd users

   $ networkctl status

   This command outputs a comprehensive status report of network interfaces, detailing their operational state as routable or otherwise. It also specifies the local IP address assigned to each active interface, along with the default gateway, offering a quick overview of the network configuration directly from the command line.

   

6. Installing iftop: For real-time IP address monitoring

   $ iftop

   This method involves the iftop package, which you must install on your Ubuntu machine. Once installed, executing the iftop command with sudo allows for real-time network traffic monitoring. This tool gives you visibility into the flow of data packets, showing the IP addresses that your computer is communicating with at any given moment. With sudo privileges, iftop offers an elevated level of detail in the traffic analysis, presenting a dynamic, constantly updating display of network connections and bandwidth usage.

   

7. Utilizing ifconfig: An older method, requires installing net-tools

   $ ifconfig

   This method, leveraging the ifconfig command, remains prevalent in older systems and with users who have a longstanding familiarity with it from other Unix-like operating systems. It is a testament to the enduring utility of traditional tools in networking that provide essential information such as IP addresses, network masks, and MAC addresses, as well as traffic statistics that can be crucial for network troubleshooting and configuration. Despite the availability of newer tools, ifconfig continues to be a cornerstone utility for many due to its simplicity and comprehensive output.

   

8. Through the GUI (For Desktop Users): Access your IP address via Settings

   In Ubuntu’s desktop environment, you can effortlessly find your IP address without using the command line. Begin by navigating to the Settings through the system menu. Within the settings, select Network to view your active connections. Here, click on the gear icon adjacent to the network you are connected to, such as your wired or wireless connection.Upon clicking, a detailed settings window will appear, providing various network details.

   Within the Details tab of this window, you will find your current IP address, along with other valuable information such as the hardware (MAC) address, the gateway your system is using to connect to the internet, and the DNS settings that resolve domain names into IP addresses. This graphical approach provides a user-friendly way to access your network configurations.

   

Additional Information: How to Find Your External IP Address

Discovering your external (public) IP address in Ubuntu can be useful for various networking tasks, such as remote access or troubleshooting external connectivity issues. Unlike local (private) IP addresses, your external IP is assigned by your internet service provider and is how the internet sees your device. To find it, you can use a command-line tool like curl to fetch your IP from an external service. Execute the following command in your terminal:

$ curl ifconfig.me
or
$ wget -qO- ifconfig.me

This command contacts the ifconfig.me website, which responds with your public IP address. It’s a quick and straightforward method to know how your Ubuntu system appears to the outside world.

Conclusion

Whether you prefer the simplicity of the command line or the visual approach of the GUI, Ubuntu offers various ways to find your IP address. By familiarizing yourself with these methods, you can efficiently manage and troubleshoot your network connections, ensuring a smooth and secure online experience on Ubuntu.