Installing PostgreSQL 9.4: "gpg: no valid OpenPGP data found"

Question

I'm trying to install PostgreSQL 9.4 on a clean, new Debian Jessie machine.

I'm following these instructions: https://wiki.postgresql.org/wiki/Apt#Quickstart

When I get to this point:

wget --quiet -O - https://www.postgresql.org/media/keys/ACCC4CF8.asc | apt-key add -

I get this error:

gpg: no valid OpenPGP data found.

What am I doing wrong?

Answer 1

These instructions are fine, you must suffer from connection problems (or get other contents served than expected. Do following:

• Run wget -o - https://www.postgresql.org/media/keys/ACCC4CF8.asc (without --quiet and without pipe to GnuPG) to inspect what's actually happening. Is wget indicating any connection problems?
• You can also download the file from your browsers, simply store the textual contents using copy-paste to a text file and import it using apt-key add [path-to-file] (or, given somebody finding this question wants to import to the default GnuPG keyring, gpg --import < [path-to-file]).

Most likely wget does not find the root certificated referenced by the PostgreSQL website, you're behind some proxy which is not configured for wget or a gateway changing the website; at least the results returned are not key data in a format GnuPG expects.

Answer 2

In my case the problem was caused by an incorrect https certificate from postgresql.

Just add the --no-check-certificate to the wget command.