1. Open the Terminal window
2. Create a new user account in the terminal
(Assuming the user name you want to create is "newuser") During the command execution, you will need to provide the new user's password. Follow the prompts.
First enter the login administrator account password.
Enter the password of the created user and repeat the password.
3. Add permissions to the newly created user
In a terminal connected to the Linux server, use the following command with administrator privileges to add the new user to the sudo group (replace new-username with the username you created)
sudo usermod -aG sudo new-username