[Qgis-user] Error when downloading apt key for installation

[Patrick Dunford]

Following the normal instructions for installing qgis on debian for the 
requirement to download from the official qgis repo:

wget -O - https://qgis.org/downloads/qgis-2017.gpg.key | gpg --import

this command is supposed to download and import the key.

However currently this performs a download, but apparently the import 
step produces an error message which is:

key CAEB3DC3BDF7FB45:

1 signature not checked due to a missing key

Other steps also produce this error message.

I've performed this step many times but have not seen this message before.