To add a user that is separate from root.
With this command we'll add the user homersimpson:
useradd -g users -u 1001 -d /home/homersimpson -s /bin/bash -m homersimpson
The option -d defined the home folder and -m to create it. The option -u set the UID (take care if you'll add more than one user). The option -g add the user to group users and -s setup the default bash.
Set a password for the new user with the passwd command: