How to know your ip linux

How to Find/Get your IP Address in Linux

Knowing the IP address of your device is important when troubleshooting network issues, setting up a new connection, or configuring a firewall.

IP Addresses can be classified into two categories, public and private. A public IP is an IP Address that is unique and can be accessed from the Internet. Private IP addresses are reserved for internal use within your private network without being directly exposed to the Internet. Furthermore, there are two types of IP addresses, IP version 4 (IPv4), and IP version 6 (IPv6).

This article explains several different methods of determining the public and private IP Addresses of a Linux system.

Find Your Private IP Address #

Private IP addresses are not routable over the Internet and are meant to work within the local network only. Typically, a private IP address is assigned to each device inside your local network by your router. This provides a unique IP address for all devices within the local network, such as your phone, laptop, smart TV, printer, media center, etc.

Devices on the local network are connecting to the Internet through NAT (network address translation).

The following IPv4 address ranges are reserved for the private networks:

You can determine your system private IP address by querying the network stack with commands such as ip , ifconfig or hostname .

In Linux, the standard tool for displaying and configuring network interfaces is ip .

To display a list of all network interfaces and the associated IP address type the following command:

The output will look something like below. The private IP address is highlighted.

You can also use the following commands to display the private IP address:

Find Your Public IP Address #

A Public IP address is a globally routable IP address that is assigned to a network device, allowing it direct access to the Internet. They are assigned to the device by its ISP, and each device has a unique public IP address.

The public IP addresses are used by home routers, web servers, mail servers, and so on.

Determining the public IP address involves contacting a remote server over the HTTP/HTTPS or DNS protocol and obtaining the IP address from the remote server response.

On Desktop machines, the easiest way to find out your public IP address is to type “what is my ip” in your browser:

If you are on a headless Linux server or you want to assign the IP address to a shell script variable you can use command-line tools such as dig , curl and wget .

Most of the DNS providers, such as OpenDNS and Google allows you to query their servers and obtain your public IP address.

You can use any of the commands below to get your IP:

dig ANY +short @resolver2.opendns.com myip.opendns.com

dig ANY +short @resolver2.opendns.com myip.opendns.com

dig ANY +short @ns1-1.akamaitech.net ANY whoami.akamai.net

There are many online HTTP/HTTPS services that respond with your public IP address. Here are some of them:

curl -s https://checkip.amazonaws.com

wget -O - -q https://icanhazip.com/

If any of the commands above is not working, there may be a problem with the online service.

You can even create an alias in your ~/.bashrc or ~/.zshrc file, so you don’t have to type and remember a long command. For example, you can add the following alias:

alias pubip='dig ANY +short @resolver2.opendns.com myip.opendns.com' 

Now, whenever you need to find your public IP just type pubip in your terminal.

Conclusion #

We have shown you several different commands and online services that you can use to find out your private and public IP address.

If you have any questions or remarks, please leave a comment below.

Источник

How to Check Your IP Address in Ubuntu [Beginner’s Tip]

Wonder what’s your IP address? Here are several ways to check IP address in Ubuntu and other Linux distributions.

Wonder what’s your IP address? Here are several ways to check IP addresses in Ubuntu and other Linux distributions. Want to know your Linux system’s IP address? You can use the ip command with the option a like this:

The output is extensive and it shows all the internet interfaces available, including loopback. Identifying the IP address could seem challenging if you are new to it.

1: lo: mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever inet6 ::1/128 scope host valid_lft forever preferred_lft forever 2: enx747827c86d70: mtu 1500 qdisc pfifo_fast state DOWN group default qlen 1000 link/ether 74:78:27:c8:6d:70 brd ff:ff:ff:ff:ff:ff 3: wlp0s20f3: mtu 1500 qdisc noqueue state UP group default qlen 1000 link/ether dc:41:a9:fb:7a:c0 brd ff:ff:ff:ff:ff:ff inet 192.168.1.53/24 brd 192.168.1.255 scope global dynamic noprefixroute wlp0s20f3 valid_lft 82827sec preferred_lft 82827sec inet6 fe80::e1d:d71b:c507:5cc8/64 scope link noprefixroute valid_lft forever preferred_lft forever 

It really is not, actually. And there are other ways to find the IP address. I’ll discuss all this in detail. But first, let’s brush up the basics.

What is an IP Address?

An Internet Protocol address (commonly referred to as the IP address) is a numerical label assigned to each device connected to a computer network (using the Internet Protocol). An IP address serves both the purpose of identification and localisation of a machine.

The IP address is unique within the network, allowing communication between all connected devices.

You should also know that there are two types of IP addresses: public and private. The public IP address is used to communicate over the Internet, the same way your physical address is used for postal mail. However, in the context of a local network (such as a home where a router is used), each device is assigned a unique private IP address within this sub-network. This is used inside this local network without directly exposing the public IP (which the router uses to communicate with the Internet).

Another distinction can be made between IPv4 and IPv6 protocols. IPv4 is the classic IP format, consisting of a basic 4-part structure, with four bytes separated by dots (e.g., 127.0.0.1). However, with the growing number of devices, IPv4 will soon be unable to offer enough addresses. This is why IPv6 was invented, a format that uses 128-bit addresses (compared to the 32-bit IPv4).

Checking your IP Address in Ubuntu [Terminal Method]

The fastest and simplest way to check your IP address is by using the ip command. You can use this command in the following fashion:

Both commands show the same output. They will show you both IPv4 and IPv6 addresses: You should identify the correct interface and then look beside inet for IPv4 and inet6 for IPv6. For example, inet 192.168.1.53/24 means the IPv4 address is 192.168.1.53.

Just get the IP address

It will just give the IP address of the system. Nothing else. There are other ways to check IP addresses in Linux but these two commands are more than enough to serve the purpose.

Long-time users might be tempted to use ifconfig (part of net-tools), but that command is deprecated. Some newer Linux distributions don’t include this package anymore and if you try running it, you’ll see the ifconfig command not found error.

Checking IP address in Ubuntu [GUI Method]

If you are not comfortable with the command line, you can also check the IP address graphically. Open up the Ubuntu Applications Menu (Show Applications in the bottom-left corner of the screen) and search for Settings and click on the icon: This should open up the Settings Menu. Go to Network: Pressing on the gear icon next to your connection should open up a window with more settings and information about your link to the network, including your IP address: You can see the IP address of your router as well in the above screenshot. It’s displayed with “Default Route”.

Bonus Tip: Checking your public IP address (for desktop computers)

First of all, to check your public IP address (used for communicating with servers etc.) you can use the curl command. Open up a terminal and enter the following command:

This should simply return your IP address with no additional bulk information. I would recommend being careful when sharing this address since it is equivalent to giving out your personal address.

If curl isn’t installed on your system, simply use sudo apt install curl -y to install curl on Ubuntu-based Linux distributions.

Another simple way you can see your public IP address is by searching for the IP address on Google.

Summary

Here’s a summary of the commands you learned:

Description	Command
Show both IPv4 and IPv6 addresses with ip command	ip a or ip addr show
Print only IP address using hostname command	hostname -I
To check your public IP address (Need curl installed)	curl ifconfig.me
Display IP Address with Network Manager tool	nmcli -p device show
Use the ifconfig command to display the IP address (Need net-tools installed )	ifconfig -a

Now that you know your system’s IP address, how about getting the gateway IP? Boost your Linux networking skills with these essential commands! In this article, I went through the different ways you can find your IP address in Ubuntu Linux, as well as gave you a basic overview of what IP addresses are used for and why they are so important to us. I also discussed IPv4 and IPv6 briefly. By the way, have you ever wondered why there is no IPv5? I hope you enjoyed this quick guide. Let us know if you found this explanation helpful in the comments section!

Hidden Features! 25 Fun Things You Can Do With DuckDuckGo Search Engine

What is TTY in Linux?

Beautifully Monitor CPU Utilization in Linux Terminal With Stress Terminal UI

How to Access the GRUB Menu in Virtual Machine

FOSS Weekly #23.28: China’s Linux OS, Linux Exit Codes, Btrfs Origins and More

Using cp Command in Linux

Become a Better Linux User

With the FOSS Weekly Newsletter, you learn useful Linux tips, discover applications, explore new distros and stay updated with the latest from Linux world

Источник