Operating System: Debian GNU/Linux 11.x - SID
KDE Plasma Version: 5.25.5
KDE Frameworks Version: 5.98.0
Qt Version: 5.15.6
Kernel Version: 5.19.0-2-amd64 (64-bit)
Graphics Platform: X11
Processors: 16 × 11th Gen Intel® Core™ i7-11800H @ 2.30GHz
Memory: 15.3 GiB of RAM
Graphics Processor: Mesa Intel® UHD Graphics
Graphics Processor: Nvidia RTX 3070 GPU
Manufacturer: ASUSTeK COMPUTER INC.
Product Name: ROG Zephyrus M16 GU603HE_GU603HE
System Version: 1.0
I am having a few troubles with something probably pretty basic here.
1. When I go to run various apps - say ‘grub-customizer’ - via the CLI as ROOT user, I get the following message:
**(grub-customizer:16632): Gtk-WARNING : 15:30:55.264: cannot open display:
I know this has something to do with what I initially did when first used the system. Unlike most; I for decades have been using ‘su -’’ command to access root user mode to run apps from the CLI that required it WHILE IN PLASMA/KDE. I have not gotten used to the ‘sudo n9nu’ (n9nu = user name) option and when it asked me for my own password I entered it and it wouldn’t accept it -
n9nu@debian:~$ sudo n9nu
[sudo] password for n9nu:
n9nu is not in the sudoers file.
Should I be listed (as a user) in any of the files below: