How can I get a list of repositories 'apt-get' is checking? [closed] - apt

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I want a list of repositories in sources.list, plus those in sources.list.d/.
Can I get this list in a form suitable for setting up
another host so it watches the same repositories?
Additionally, how do I determine which repository is the
source of a package, either installed or available?

Answer 1

It seems the closest is:
apt-cache policy

Answer 2

As far as I know, you can't ask apt for what their current sources are. However, you can do what you want using shell tools.
Getting a list of repositories:
grep -h ^deb /etc/apt/sources.list /etc/apt/sources.list.d/* >> current.repos.list
Applying the list:
apt-add-repository << current.repos.list
Regarding getting the repository from a package (installed or available), this will do the trick:
apt-cache policy package_name | grep -m1 http | awk '{ print $2 " " $3 }'
However, that will show you the repository of the latest version available of that package, and you may have more repositories for the same package with older versions. Remove all the grep/awk stuff if you want to see the full list.

Answer 3

Try this:
cat /etc/apt/sources.list

Answer 4

It's not a format suitable for blindly copying to another machine, but users who wish to work out whether they've added a repository yet or not (like I did), you can just do:
sudo apt update
When apt is updating, it outputs a list of repositories it fetches. It seems obvious, but I've just realised what the GET URLs are that it spits out.
The following awk-based expression could be used to generate a sources.list file:
cat /tmp/apt-update.txt | awk '/http/ { gsub("/", " ", $3); gsub("^\s\*$", "main", $3); printf("deb "); if($4 ~ "^[a-z0-9]$") printf("[arch=" $4 "] "); print($2 " " $3) }' | sort | uniq
Alternatively, as other answers suggest, you could just cat all the pre-existing sources like this:
cat /etc/apt/sources.list /etc/apt/sources.list.d/*
Since the disabled repositories are commented out with hash, this should work as intended.

Answer 5

All I needed was:
cd /etc/apt
nano source.list
deb http://http.kali.org/kali kali-rolling main non-free contrib
deb-src http://http.kali.org/kali kali-rolling main non-free contrib
apt upgrade && update
Source: Kali Network Repositories (/etc/apt/sources.list)