Where can i change my repository in the docu is it there but in my distro not where is it i added 2 picture one is from the docu and the other fromme

[Stabscecke217]

I have the question where is my repositry change button its not here i want to change to the no subscription repo and i didnt find the butten can please someone explain how i can change it because when i make it with "nano /etc/apt/sources.list." in the directionary and i become the exit code 100 what shuld i do ? and i have proxmox 6.4.4

The Picture frm the docu
There is no Repositories button and the "Exit code 100" Error

 

[LnxBil]

nano /etc/apt/sources.list.

Did you really use the . at the end? If so, please omit it and try again.

 

[fabian]

if you are on 6.4, that feature might not have existed back then .. you can manually change the repositories, but please follow the upgrade guidelines to upgrade from 6 to 7 and then from 7 to 8, it's not possible to upgrade from 6 to 8 directly..