It’s just one simple command to add a user. In this case, we’re adding a user called newuser :

# adduser newuser

# passwd newuser

# visudo

Find the following code:

## Allow root to run any commands anywhere
root ALL=(ALL) ALL

In this case, we’re granting root privileges to the user newuser . Add the following below that code:

newuser ALL=(ALL) ALL

Then exit and save the file and that’s it!