To check the public IP in a Linux terminal, you can use the following methods: 1. Use curl to access online services, such as curl ifconfig.me, curl ipinfo.io/ip, or curl checkip.amazonaws.com; 2. Use the wget command, such as wget -qO- ifconfig.me; 3. Check the network interface information, run ip addr show or ifconfig to determine whether there is a public IP; 4. Set aliases to simplify operations, such as alias myip='curl ifconfig.me' and add it to .bashrc or .zshrc. These methods do not require complex tools and are suitable for different scenarios. They can quickly obtain public IP, and can also determine whether the device has public IP.

Want to know how to check your public IP in a Linux terminal? In fact, the method is quite straightforward, and there is no need to install any complicated tools. It can be done with a few simple commands.

Use curl to call online services to check public IP

The most common and convenient method is to access some services that provide public IP query through the curl command. For example, the following:

• curl ifconfig.me
• curl ipinfo.io/ip
• curl checkip.amazonaws.com

These services will directly return your public IP address, without any parameters or login. If you have installed curl , you can check it out easily.

Tip: If curl is not installed, you can use the package manager to install it, such as running sudo apt install curl on Ubuntu.

Similar effects can be achieved with wget

If you are more accustomed to using wget , you can also use it to obtain the public IP. The command is a little longer, but the effect is the same:

 wget -qO- ifconfig.me

The meaning of this command is: silently download ( -q ) and output it to the terminal ( -O- ), and then visit ifconfig.me website to obtain the IP. The effect is similar to using curl.

View network interface information (suitable for intranet users)

Although the above methods can find the public IP, sometimes you may want to confirm whether your server or device has a public IP. At this time, you can combine ip or ifconfig command to view the network interface information.

For example, run:

 ip addr show

or:

 ifconfig

You will see addresses like inet 192.168.xx or inet 10.xxx , which are private IPs. If you see addresses like inet 8.xxx or inet 1xx.xxx , it is likely to be a public IP.

However, this method can only determine whether your current device directly has a public network IP, and cannot be used to obtain a public network export IP. For example, when you are behind NAT, you still see the intranet address.

If you need to check it often, you can write a quick alias

If you often want to check the public IP in the terminal, you can add an alias to the command, such as:

 alias myip='curl ifconfig.me'

Add to .bashrc or .zshrc , save and run source ~/.bashrc (or the corresponding shell configuration file). In the future, just enter myip and you can directly see the public IP.

Basically these methods. Just choose a convenient one, without being too complicated.

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