Install gnome-shell-extension-show-ip by entering the following commands in the terminal:
sudo apt update sudo apt install gnome-shell-extension-show-ip
Description:
Shows the current private or public IP address
Show-IP is a GNOME Shell extension that shows the current private or public IP address if NetworkManager is used. It allows the user to set which device to display if there are multiple devices activated and supports both IPv4 and IPv6. . It makes use of a non-free service (http://ipinfo.io) by default to determine the system's public IP, however this can be changed in the preferences to use another lookup service of your choice.
Homepage: https://github.com/sgaraud/gnome-extension-show-ip
Version: 8-3
Section: universe/gnome