How to Add a User to Sudoers on Linux (Safely and Correctly)

Giving a user sudo access on Linux lets them run commands with administrator (root) privileges. That’s powerful — and dangerous if you’re not careful. This guide walks through what “sudoers” actually means, how it works, and several ways to add a user to sudoers on popular Linux distributions.

You’ll see where the steps differ between systems like Ubuntu, Debian, CentOS, Fedora, and others, and what choices you’ll need to make based on your own setup.

What Is “sudo” and the sudoers File?

On most Linux systems, you don’t log in as root directly. Instead, you:

• Log in as a regular user
• Use the sudo command to temporarily run specific commands with root privileges

Example: