Fix: “User Is Not in the Sudoers File” | Linux Sudo Error Explained

Описание: Encountered the error “duke is not in the sudoers file. This incident will be reported.”?
In this video, I explain why this happens, what it actually means, and how to safely fix it.

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Your Queries:
How do I add a user to the sudoers file?
How to fix “user is not in the sudoers file” in Ubuntu?
How to give sudo access to a user in Linux?
How to fix sudo permission denied error?
What does “not in the sudoers file” mean in Linux?
Why does Linux say “this incident will be reported”?
Is this error dangerous or just a warning?
What is the sudoers file used for?

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