First of all you have to be logged in as root. Just type command below followed by your password:
terminator@skynet:~$ sudo su - [sudo] password for terminator:
Now that you are root you can use the following command to create the user:
You will be prompted for password, information and confirmation. Once done you can use the following command to give SUDO powers to that user:
usermod -aG sudo <username>
Here is an example of the console output:
root@skynet:~# adduser sconnor Adding user `sconnor' ... Adding new group `sconnor' (1004) ... Adding new user `sconnor' (1004) with group `sconnor' ... Creating home directory `/home/sconnor' ... Copying files from `/skynet/skel' ... Enter new UNIX password: Retype new UNIX password: passwd: password updated successfully Changing the user information for sconnor Enter the new value, or press ENTER for the default Full Name : Sarah Connor Room Number : Work Phone : Home Phone : Other : Is the information correct? [Y/n] Y root@skynet:~# usermod -aG sudo sconnor root@skynet:~#
Hasta la vista baby!