You’re still in PuTTY - open your browser and go to the Debian sources.list generator. Source: over 1 year ago

1) Beware New Shiny Stuff Syndrome Https://wiki.debian.org/DontBreakDebian/#Don.27t\_suffer\_from\_Shiny\_New\_Stuff\_Syndrome 2) I assume you want the latest versions of some things and not all. From Stable you can use a) Backports b) Flatpak and Snaps c) SOME Third Party Repositories. Compare Don't Break Debian https://wiki.debian.org/DontBreakDebian and some of the Third Party Repositories on e.g.... Source: almost 2 years ago

You have to comment out the cdrom entries in /etc/apt/sources.list and make sure your other entries are correct and then run apt update. I always end up using this for generating sources lists. Source: about 2 years ago

The list looks alright. If you are unsure about if it's only the repos that you need, you can grab from google a fresh offical debian sources.list. Also there is a website, you can generate for debian custom sources.list with and mark which repos you want in the list, you can also mark repos like spotify, signal and more. On this link you can generate your own list: https://debgen.simplylinux.ch/ Just double check... Source: about 3 years ago

Even the generator's selection of third-party repos seem copy-pasted.. (and definitely not by someone who cares about free software). Source: about 3 years ago

What you are looking for is the same sort of solution that exists for real, networked systems -- basically a network software deployment tool like https://emcosoftware.com/remote-installer,. Source: over 2 years ago