#Docker 🐳 – Add an external repository to the Source List, and add the key from the external server 🤷‍♂️

Hi !

Ok, here goes nothing. And this is mostly so I can avoid to learn again how to do this in the future.

I needed to install a package in my docker Linux file, and I realized that I needed to add a specific source to the debian source list before. After this, I run an apt-get update command and I found that there was a issue with the keys.

GPG error: http://www.elbrunostuff.com/tools sid InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY E50DDB1FDER26384

Important: this is for a Debian base scenario. In Ubuntu I realized is easier.

So, in order to add the key, I needed to add these lines to my docker file.

  • Line 1, add the external repository to the source list
  • Line 2, add the key from the external key server
  • Line 3, update
  • Line 4 install !
RUN echo "deb http://www.elbrunostuff.com/tools sid main" > /etc/apt/sources.list
RUN apt-key adv --keyserverkeyserver. elbrunostuff.com --recv-keys E50DDB1FDER26384
RUN apt-get update 
RUN apt-get install -y elbruno-gattlibstuff

I know, Linux experts may type this in 10 minutes. I took me all morning 😂

Happy coding!

Greetings

El Bruno



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