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I ran a fresh install of Debian stretch 9.8.0 and all was well. I then ran 

sudo apt update

and I get an output which hits the ftp.debian.stretch server for the update thing is it tells me 

unable to retrieve update trusted.gpg keys unauthorised

So I do a bit of research and came across a post, it said

Rename trusted.gpg to trusted.gpg-broken

And now I can sudo apt update and basically get what ever I want as standard, but I don’t understand why after a fresh install the trusted keys were not found in the file?

And I also don’t understand what changing trusted.gpg to trusted.gpg-broken actually did to the keys.

Rui F Ribeiro
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Curiouskangaroo
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  • [This post](https://unix.stackexchange.com/questions/379344/debian-stretch-package-system-breaks-when-non-free-added)? – pLumo Mar 08 '19 at 10:23
  • That’s the one I followed to get it working, but I want info on why this fixes it and what does -broken acctually do? Nice1 Rovo – Curiouskangaroo Mar 08 '19 at 11:52
  • `-broken` doesn't mean anything. You can call it `-backup` or simply delete it to have the same effect. Renaming the file is just to get the old one out of the way but don't delete it for backup reasons. I think when the file is missing, `apt` will somehow regenerate (and thus fix) it. Why it happens in the first place, I don't know. – pLumo Mar 08 '19 at 12:39
  • Sweet so just the renaming of it basically. When apt looks for the keys can not locate the directory so bypass that step I take it. – Curiouskangaroo Mar 08 '19 at 12:47

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