You logged in as user tuxl, but now you want to switch users to tux2 with tux2’s environment.
How would you do this?

A.
su -e tux2

B.
su -f tux2

C.
su – tux2

D.
su tux2

E.
su -m tux2

Explanation:
su means switch user.
To switch from one user to another user with another user’s environment and home directory use – option.
Here switching to tux2, then su – tux2 is answer.