How to get the ip in linux

How to Get IP Address in Linux

In this article, I am going to show you some of the common ways to find the IP address of your Linux server or workstation. So, let’s get started.

Finding IP Addresses with ip Command:

The ip command is the most popular command for finding the IP addresses assigned to the network interfaces of your Linux server or workstation. You will very likely find this command preinstalled on every modern Linux distribution out there.

To find the IP addresses of all the network interfaces connected to your Linux server or workstation, run the ip command as follows:

As you can see, I have 2 network interface attached to my CentOS 7 server. One is ens33 and the other one is ens37. The ens33 network interface has the IPv4 address 192.168.21.131 and the ens37 network interface has the IPv4 address 192.168.50.1.

The ip command also prints the IPv6 address attached to the network interfaces of your Linux server or workstation.

As you can see, on my CentOS 7 server, the IPv6 address attached to the ens33 network interface is fe80:fd75:7722:6480:6d8f. The same way, the IPv6 address configured to the ens37 network interface is fe80:20c:29ff:feaa:bd0e.

If you want, you can also find the IPv4 or IPv6 address configured to a specific network interface.

For example, to find the IP (IPv4 or IPv6) address of the network interface ens33, run the ip command as follows:

As you can see, the IP addresses of the network interface ens33 is shown only.

Finding IP Addresses with nmcli:

nmcli is the command line tool for configuring Linux network interfaces via Network Manager. You can use it to find the IP addresses configured on the network interfaces on your Linux server or workstation.

To list all the Network Manager network interface connections you have on your Linux server or workstation, run the following command:

As you can see, I have 2 Network manager connections Private (for the interface ens37) and ens33 (for the interface ens33). On Network Manager, you can name your network connections. I have named one here (Private) and left the other (ens33) without naming it anything.

Now, to see the IP addresses configured on the network connection Private, run the nmcli command as follows:

As you can see, the IPv4 (and IPv6 if configured) address is listed. In my case, the IP address is 192.168.50.1.

We can also find the IP addresses of the ens33 (unnamed) network connection with nmcli as follows:

As you can see, the IP address of the ens33 network connection is listed. But something is different here. The network connection ens33 got the IP address via DHCP. That’s why it is in the DHCP4 OPTION.

Finding IP Addresses with ifconfig Command:

ifconfig is a very old command for finding the IP addresses of Linux servers and workstations. It is so old that is it not even installed on any modern Linux distribution by default. I’ve included it here because you might have to maintain very old servers with some old Linux distribution. The command is very simple to use anyway.

To find the IP addresses of all the network interfaces of your Linux server or workstation, run the ifconfig command as follows:

As you can see, the IP addresses of all the network interfaces on my CentOS 7 server is listed.

If you want to list the IP address of any single network interface (let’s say ens33), then run the ifconfig command as follows:

As you can see, the IP address of the ens33 network interface is printed on the console only.

Finding IP Addresses in GNOME Desktop Environment:

If you’re using a graphical desktop environment on your Linux workstation such as GNOME 2 or GNOME 3, then you can find the IP address of you network interface graphically.

On GNOME desktop environment, open the Settings app and click on Network as marked in the screenshot below.

Now, select the network interface which you want to find the IP address of and you should be able to find the IP address of that network interface as you can see in the screenshot below.

Finding the Public IP Address of your Server:

You can use a third party website ifconfig.me to find the public IP address of your Linux server very easily. For this to work, you need to have curl installed on your server.

To find the public IP address of your Linux server, run the following command:

So, that’s how you find the IP address in Linux servers and workstations. Thanks for reading this article.

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How to Find or Check Your IP Address in Linux

Home » Networking » How to Find or Check Your IP Address in Linux

An IP address is a codename assigned to a computer on a network. It works as a postal address, ensuring that network traffic is sent to the correct computer.

In this tutorial you will learn how to find your IP address using a Linux operating system.

• A Linux operating system
• Access to a terminal window/command-line (optional) (Ctrl–Alt–T, Ctrl–Alt–F2)

Find Your IP Address From the Command Line

There are a few different commands you can use to check your IP address. To run these commands, start by opening a terminal window/command line.

Using the hostname Command

One way to check your IP address from the command-line is by using the following command:

The system will display your internal IP address.

Using the ip addr Command

Check your ip address with the ip addr command:

The system will scan your hardware, and display the status for each network adapter you have. Look for an entry that says link/ether. Below it, you should see one of the following:

The entries will include one for a wired (Ethernet) adapter and a wireless (Wi-Fi) adapter. You may also have an entry for a virtual adapter. Generally, only one entry will have an IP address listed – that is the one you will want.

Note: The number after the slash – /24 and /64 – specifies the size of the network, and it helps with scanning and mapping network size.

Using the ifconfig Command

The third method to find your IP address involves using the ifconfig command. In the command line, enter the following:

The system will display all network connections – including connected, disconnected, and virtual. Look for the one labeled UP, BROADCAST, RUNNING, MULTICAST to find your IP address. This lists both IPv4 and IPv6 addresses.

Note: When you check your IP address, you may notice the term loopback. This refers to an IP address that returns traffic to the same computer. Usually, the loopback address is 127.0.0.1 . If you see that address listed, either you are looking at the wrong line, or you are not connected to the network.

Read phoenixNAP’s ultimate Linux IP command tutorial with 31 examples to learn more!

Finding Your IP Address in Linux With a GUI

If you are using a point-and-click interface to run your Linux system, you can check your IP address by following these steps:

1. Go to the Application menu and type Settings into the search bar.

2. Click on the Settings icon that appears among the results, as in the image below:

3. Next, find the Network tab in the Settings Menu and click on the Advanced Wired Settings icon.

4. This opens a new pop-up window with details on wired settings. Here you can find both your IPv4 address and your IPv6 address.

How to Find Public IP Address

To find your public IP address, reach out to an external website.

If you are using a browser, navigate to:

If you are using a command-line or terminal, use a retrieval command like curl or wget to display the external IP address:

Note: Did you know that when you use curl to connect to an insecure website, the output responds with an error? To resolve it, visit our guide on making curl ignore certificates.

What is a Public/Private IP Address?

Each computer in a network is required to have its own IP address. If two systems have the same IP address, it will generate errors on the network. Most modern networks will detect the problem and prompt you to fix it. However, older networks might get confused, trying to route traffic to both computers.

Most systems will have two different IP addresses:

• Private IP address: This is the address used on the network. Also, it is the one you will want to use for configuring routing tools. On smaller networks, the internal IP address typically starts with 192.168.x.x. It is dynamically assigned to your computer whenever you connect.
• Public IP address: This is the IP address that registers on a website when you visit it. When you connect to a small network, your computer connects to a router using an internal IP address. That router, in turn, connects to a bigger network (like an Internet Service Provider), which has its own IP address system.

Now you know how to find a private and public IP address in Linux using multiple methods.

Each option strikes a balance between speed and complexity. Now you have the flexibility to choose, if you only need your internal IP address, you can use the hostname method. If you need more detailed information, view our article on 31 Linux IP Commands with examples.

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How to get your IP Address on Linux

Public and Private IP Addresses

IP addresses are an essential part of modern networked communications. In this guide, we will show you how to find your own IP address. These instructions will work for most of the various Linux distributions like Ubuntu, Debian and Linux Mint, among others. BSD systems like FreeBSD and NetBSD, as well as Mac OS, might also be able to read their IP addresses using these instructions.

What is an IP Address?

Understanding the TCP/IP Protocol

IP addresses arose as part of what’s known as the TCP/IP protocol. This is a networking standard that defines how data is packaged and transferred between computers that are joined together in a computer network.

The TCP/IP protocol was invented in 1978 by Bob Kahn, Vint Cerf, and others.

TCP stands for Transmission Control Protocol, which is the protocol responsible for the reliable transmission of data over networks. In particular, TCP checks integrity of transmissions, and provides for re-transmission if packets have not been delivered correctly.

The IP protocol, on the other hand, deals with the routing of packets (like those sent by TCP). IP stands for Internet Protocol, which defines rules that let packets be sent from an origin to a destination computer. Under the IP protocol, packets are routed by a path of computers that gets progressively closer to the packet’s intended recipient.

Each computer or device on the network is identified by an IP address, which is a numeric identifier unique to that device on the network.

Differences Between Public and Private Addresses

There is a difference between IP addresses on the public internet and private IP addresses inside a local computer network. Internet Service Providers (ISPs) assign public IP addresses, which is akin to your public home address. When computers connect to the private network, they each get a private IP address to be used within just that network. Private IP addresses are assigned by your router or another device within the network. In turn, the router can route incoming packets to the correct device on the network using network address translation (NAT).

How to Find your Public IP Address

You can discover your public IP address using a variety of commands that connect to the internet to run queries for you.

Getting your Public IP Address with the dig Command

The dig command is a DNS lookup utility for Linux. Using dig , you can look up your public IP address by connecting to OpenDNS servers. OpenDNS hosts DNS servers that help discover the IP addresses of networks on the internet. Run the following command inside your bash, sh, or other terminal.

As output you should get back your public IP address from OpenDNS resolvers. Your IP address will be a series of groups of digits of the format 216.58.216.164 (which is one of the many IP addresses for Google), or a variation of this sort.

Using Curl to Return your Public IP Address

The curl command is another networking utility that allows you to interact with servers on the internet. You can query servers to return your public IP using the following options:

The output of each command will be your public IP as seen by these servers.

There are many other servers that can return your public IP address besides these two given above.

Using wget Instead of curl

wget is a commonly available utility for Linux that you can use instead of curl to download data and interact with servers. You can use wget to retrieve your public IP using the command:

Using a Browser

If you have a browser available, you can visit one of the many IP websites out there:

or you can also check the other websites we reached with curl to see your IP in the browser. There are cases, such as when you are logged on to a Linux server, where you do not have access to a graphical user interface. In such cases, use the shell commands.

Get your Private IP Address with the ifconfig Command

You have multiple ways to get your private IP address. One way is to use the ifconfig command. ifconfig is a command line program that configures network interfaces on Linux.

You can retrieve your IP address using the ifconfig command coupled with various flags that filter for your private IP address. Run the following command inside your shell:

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The above command checks all the active network interfaces, then filters for the TCP/IP interface, and finally filters the output for the local IP address. The final output is your private IP address. This will look similar to 192.168.1.2 or some variant.

We can filter the ifconfig output using sed instead, which is a utility for parsing and transforming streams of text. Run the following command to get your private IP address:

In this example, we are filtering ifconfig output to get your IP address under the TCP/IP protocol. The above commands may fail if you do not have sed or ifconfig installed. In case the command fails, try the hostname command and follow the method below.

How to Find your Private IP Address using Hostname Command

The https://linux.die.net/man/1/hostname command returns the DNS information of the machine. You can find your private IP address by executing the following command in your shell:

The above command enumerates all your configured addresses on all network interfaces, including your private IP address.

Get your Private IP Address with the IP Command

We can also get the private IP address of a Linux machine using the ip command. The ip command shows and manipulates routing, devices, policy routing and tunnels.

We can use the following variations of the ip command with flags to return our private IP address.

These commands print out the routing table entries for sending a request to alternate servers. These involve our private IP address as the source of the requests. We are filtering for that source using the Linux commands head, awk and cut to extract our private IP address.

Finding your Private IP Address from Network Connection Settings

Besides the command line and the browser, we can also use Linux administrative applets. You may need to adjust these instructions to suit your exact Linux distro.

• Navigate to your «Menu»
• Find the «Preferences» tab
• Navigate to «Network» or the equivalent for managing your network information
• Select the network type, (i.e. Wi-Fi, Ethernet, or other)
• You can view your private IP address under the printed information about your IP

This will not work in a strictly command-line environment but will work on desktop Linux systems. If you are on a command-line only login, then you will need to try the other command-based methods given above.

Numerous ways to get IP Address on Linux

As we saw, there are multiple ways to get your IP address on a Linux system. There are in fact two types of IP addresses, a public IP address and a private IP address. The public IP address identifies your computer or network to the outside world. Your private IP address identifies your machine inside your private network. To get your IP addresses, you can use a mix of commands such as ifconfig, ip or hostname, or make use of graphical environment apps.

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