create a new user and document the steps

[AsciiRose]

create a new user without the commands:

• useradd, userdel, usermod
• groupadd, groupdel, groupmod
• chpasswd

create a documentation that records each step along with a brief explanation

use the following properties:

username: piuser
password: geheim
primary group: users (create beforehand if necessary)
other groups: www-data, audio
home directory: /home/piuser
loginshell: /bin/bash