Why does sudo ask for a password in terminal? Why does sudo ask for a password when one can sudo su without a password and perform the same commands? Is there a way to make sudo not ask for a password when you're logged in as the an admin anyway?
sudo su asks for a password on my system. Did you run another sudo command before the sudo su? Once you've run sudo and entered your password, it doesn't require a password again for a period of time.