Cannot enter password for the super user in the terminal

Title says it all. Trying to get access to the super user to do some stuff with the terminal that requires a super user, but when i type in 'su' and it prompts me for the password, it wont let me type it in. I'm the admin and noone else uses this computer

Trying to get access to the super user to do some stuff with the terminal that requires a super user, but when i type in 'su' and it prompts me for the password, it wont let me type it in.
First, you should be using sudo instead of su. Second, the password won't appear in the Terminal while being typed, not even as bullets.
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