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Add a User to Sudoers on Ubuntu 20.04 LTS - Step by Step Process ?

This article covers how to add a user to sudoers using different methods, limit root access with sudo and remove a user from sudoers.

Sudo is a very handy tool for system administrators that allow them to provide root access to a user with granularity.


Steps to Add Sudo User on Ubuntu ?

1. Log into the system with a root user or an account with sudo privileges.

2. Open a terminal window and add a new user with the command:

# adduser newuser

The adduser command creates a new user, plus a group and home directory for that user.

You may get an error message that you have insufficient privileges. (This typically only happens for non-root users.) Get around it by entering:

# sudo adduser newuser

3. You can replace newuser with any username you wish. The system will add the new user; then prompt you to enter a password. Enter a great secure password, then retype it to confirm.


To Add User to Sudo Group:

1. In a terminal, enter the command:

# usermod -aG sudo newuser

Replace newuser with the username that you entered in Step 1.

Again, if you get an error, run the command with sudo as follows:

# sudo usermod -aG sudo newuser

The -aG option tells the system to append the user to the specified group. (The -a option is only used with G).