dear members,
I have the administrator account in kde neon, only I have no administrator rights in the terminal.
How can I restore these rights in the terminal?
Via a command or something in the settings.
Greetings,
Jeffrey

Neon, as it is based on Ubuntu, does not use a 'root' account, but uses sudo to elevate privileges temporarily on the terminal.
Normally, sudo is used before a command, and you won't have to use it again for a while (15 mins?)

You can use sudo -i to have a persistent sudo session, if you wish.

use sudo if its linux based

as stated you can 'sudo' any command
you can also 'sudo su' which will give you root access but be carefull