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.
It is, run as administrator is a windows concept, in Linux programs that need elevated privileges will ask for it, so if you need a specific program to be entirely elevated you’re asking something quite unique. I’ve asked multiple times, I’ll ask again, why do you want this? Give me a concrete example of what you’re trying to do, just saying running any program as root is not a good answer.
Since I know you’re not going to (because I already asked at least 3 times and others have as well and you haven’t answered anyone, so I think you don’t know why you want this other than “because Windows has it”), here’s the generic answer for you, on the login screen type root as your user and input your root password, there you go, you don’t even need that menu item anymore since everything runs as root now, just like in Windows.