

I’m not sure exactly what causes this, but you can work around it as long as you can actually run commands as root (i.e. using sudo) in the terminal.
The command to add a new user is adduser.
The command to add a user to the administrators group (i.e. give them the ability to use sudo) is usermod -aG wheel.
These commands should be run as root by prepending sudo.




If you know the root password, then you can switch to the account called
rootusing thesu rootcommand.In Linux there is always a user called
root, which is the only account allowed to perform most system management tasks. Thesudocommand just executes a commend asroot. Most of the time you don’t need to actually sign into therootaccount, just usesudo, but you can actually sign into it in the terminal as it is a real bona fide user account.The sudoers file is located at
/etc/sudoers. Do keep in mind that this file should not be edited directly. You can use thecatcommand which will print the content of a file to the terminal. So trycat /etc/sudoers.