How do I add another main user in Xubuntu with gksu?

Question

I want to add another main user that has sudo rights to do everything on my system.

How can I start the "Users and Groups" application without using that name?

Because I have a rights problem on my computer, I cannot start it as the main user, only with gksu

what is the internal name of that program?

score 3 · Accepted Answer · edited Apr 13 '17 at 12:24

The command is users-admin

You can Alt+F2 then run

users-admin

To add a new user you will need to supply the admin password (assuming you are the first user, that will be yours)

To do so via command line, use the adduser command.

If unable to do so from within a booted system, run the recovery mode from your boot menu and use a root terminal.

You will need to mount as read/write prior to making any changes from there. ( see answer here Unable to mount filesystem as read-write in recovery mode )

mount -o rw,remount /

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