I found a (lengthy) guide to doing this but it is for gksu which is gone. I have to imagine there’s an easy way. I am running Ubuntu. There is no specific use case, it is just a feature I miss from windows.
EDIT: I always expect a degree of hostility and talking-down from the desktop Linux community, but the number of people in this thread telling me I am using my own computer that I bought with my own money in a way they don’t prefer while ignoring my question is just absurd and frankly should be deeply embarrassing for all of us. I have strongly defended the desktop Linux community for decades, but this experience has left a sour taste in my mouth.
Thank you to the few of you who tried to assist without judgement or assumptions.
Sometimes people want to be generally helped, and sometimes people just want an answer to their question. If the answer is “it’s impossible” then that’s a valid answer, but if the answer is “I’m not going to tell you, instead I’m going to assume that what you actually want is me to teach you why you were wrong to ask the question in the first place” then theres a good chance that actually they just wanted an answer, and you deciding for them what they need comes across as patronising.