After updating Ubuntu, or after installing and uninstalling some packages, you may not find the configuration option (Gnome Control Center) in Ubuntu OS. To fix the missing settings app issue, please follow the steps below.
First, check if the Settings app is installed on your system. In the terminal (ctrl + alt + t), run the following command.
If you get a not found error, use the following command to install the Settings app.
sudo apt install gnome-control-center
Enter your Ubuntu password to confirm the installation during the installation process. After installation, you can execute the following command.
You can also search from the application’s view menu.
Also read: How to install TestMace on Ubuntu-API test development tool