EXPKEYSIG debian ubuntu fedora

Fix EXPKEYSIG 9DC858229FC7DD38

Docker CE <docker@docker.com> — by Docker Inc.

Official Key Page: https://docs.docker.com/engine/install/
Error message 
EXPKEYSIG 9DC858229FC7DD38 Docker CE <docker@docker.com>

Your distro

Fix commands for openSUSE

Method 1 Import key from URL

Imports the key via rpm and refreshes zypper repositories.

openSUSE — bash
$ sudo rpm --import https://download.docker.com/linux/ubuntu/gpg
$ sudo zypper refresh
Official documentation

Method 2 Import via GnuPG

Fetches the key from a public keyserver and imports it into the RPM trust store.

openSUSE — bash
$ gpg --keyserver hkps://keys.openpgp.org --recv-keys 9DC858229FC7DD38
$ gpg --export --armor 9DC858229FC7DD38 | sudo rpm --import -
$ sudo zypper refresh

After importing the key

Run sudo apt-get update (or your distro's equivalent) again. If successful you should see Hit: lines with no EXPKEYSIG warnings. Still broken? Check that your /etc/apt/sources.list.d/ entry references the correct [signed-by=…] keyring path.