How to tell which repositories provide which packages?

[Chris Green]

On Tue, Jan 05, 2021 at 03:29:17PM -0500, Little Girl wrote:
> Hey there,
> 
> Chris Green wrote:
> 
> >Is there a way to tell from which repositories packages have been
> >installed?
> >
> >I particularly want to see if I have any packages installed from a
> >particular PPA.
> 
> This will give you your installed version, the candidate version
> that's available (if any), and the sources for the various versions:
> 
> apt-cache policy PACKAGENAME
> 
This doesn't really tell me the truth:-

    chris at esprimo$ apt-cache policy '*' | grep syncthing
    syncthing:
    syncthing-relaysrv:
    golang-github-syncthing-syncthing-dev:
    golang-github-syncthing-notify-dev:
    syncthing-discosrv:
    chris at esprimo$ dpkg -l | grep syncthing
    ii  syncthing                             1.12.0
          amd64        Open Source Continuous File Synchronization
    chris at esprimo$ 

So apt-cache policy '*' returns things which either aren't package
names or aren't installed.


> If you're feeling frisky, either of these will probably give you way
> more information that you need, but can be good to keep in your back
> pocket:
> 
> dpkg -s PACKAGENAME
> 
> apt-cache showpkg PACKAGENAME
> 
Neither of these seems to show anything about the PPA.

-- 
Chris Green