Signatures couldn't be verified because the public key is not available error while installing docker

Seems like the getting started page has changed.

Aug 2017

curl -fsSL https://download.docker.com/linux/debian/gpg | sudo apt-key add -

https://docs.docker.com/engine/installation/linux/docker-ce/debian/#install-using-the-repository

Aug 2019

The link to the installation page has changed again

https://docs.docker.com/install/linux/docker-ce/debian

If don't want to use those commands from manual http://docs.docker.com/linux/step_one/:

$ sudo apt-get update
$ sudo apt-get install wget
$ wget -qO- https://get.docker.com/ | sh

there is what you need:

 $ wget -qO- https://get.docker.com/gpg | sudo apt-key add -

PS: https://docs.docker.com/installation/debian/

Got the solution, I was trying to install docker 1.5 on a 32-bit Ubuntu, whereas the documentation says it needs 64 bit Ubuntu.

check here in Prerequisites section

Related