Example of the use of Switches

To update the list of repositories one usually needs super-user permissions (or use a super-user account). In the former case, one needs to prepend the commands with the sudo keyword and (during execution) type the password. Then, to upgrade the packages (if any) one has to type the upgrade command using the sudo command again and confirm the instruction. To simplify the process one can run both commands at once and add a confirmation switch after (see line 4).

1: sudo apt update
2: sudo apt upgrade
3: 
4: sudo apt update && sudo apt upgrade -y