Re: [Ghm-discuss] How to your keys ?

[Alfred M. Szmidt]

      gpg --no-tty --no-auto-check-trustdb --batch --no-armor --always-trust -r 
531B6686 -e /tmp/pius_tmp/pius_tmp

That is trying to encrypt (the -e option) the file
/tmp/pius_tmp/pius_tmp, very little to do with signing a key.

To sign a key, first import it:

  $ gpg --keyserver KEYSERVER --recv-keys KEYID

Then check the fingerprint:

  $ gpg --fingerprint KEYID

Finally, sign it:

  $ gpg --sign-key KEYID

(If you have multiple private keys, pass the --default-key KEY-TO-USE
option as well)

And as a final step, so others can get an updated version of the key,
upload it to a keyserver (yes, that is the KEYID of the key you just
signed, not the key you used to sign it with!):

  $ gpg --keyserver KEYSERVER --send-key KEYID

A good keyserver is certserver.pgp.com.