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- How to enable root login? 6 answers
How can I make my main user which I log into, an administrator just like in Windows XP?
That is not the question you should be asking.
The purpose of sudo is to provide the function of administrator, without leaving the computer open to be exploited (at privileged-account level) when the user opens a file, goes to a website, or attaches a device.
Note: That is a weakness (or flaw) in Windows XP, and one more reason why that OS is no longer safe (or supported).
But you already have it. You can