Using the Terminal in Linux Mint is much much more frequent than using the command prompt in Windows.
Here is a simple way to set the given Terminal session as root till the time it is exited.
To switch from the existing logged on user in Mint Terminal to root, just open the Terminal and type in sudo -i
[If you want to see what the current user name is, use whoami as shown, after executing sudo -i , run whoami again and note that the user is now root.]
Enter the root password and from now on the prompt changes to # and user is a root who can do some serious stuff that can impact Mint heavily .
Do remember that with great power comes great responsibility 😉