How to Fix Missing 'System Settings' or 'Settings' in Ubuntu 18.04 LTS?br br Step 1: Right Click on the Desktop and Click 'Open terminal'.br br You can also open Terminal by pressing Alt+Ctrl+t key on the keyboard.br br br Step 2: To install System Settings, type the command below in terminal:-br br 'sudo apt install gnome-control-center' without quotes and hit enter.br br if it asks for your permission, press 'Y' key on the keyboard.br br br Step 3: To open the system settings, you can type the command below in terminal:-br br 'gnome-control-center' without quotes and hit enter.br br Another way to open 'system settings' or 'settings':-br br Click on show Applications at the bottom left of your ubuntu and Type 'settings' in search box.