debian:~# gpg --keyserver wwwkeys.eu.pgp.net --recv-keys 07DC563D1F41B907 thengpg --armor --export <pubkey> | apt-key add
-su: syntax error near unexpected token `|'
debian:~# gpg --keyserver wwwkeys.eu.pgp.net --recv-keys 07DC563D1F41B907
gpg: requesting key 1F41B907 from hkp server wwwkeys.eu.pgp.net
gpg: /root/.gnupg/trustdb.gpg: trustdb created
gpg: key 1F41B907: public key "Christian Marillat <marillat@debian.org>" imported
gpg: no ultimately trusted keys found
gpg: Total number processed: 1
gpg:               imported: 1
debian:~# gpg --armor --export 07DC563D1F41B907 | apt-key add
gpg: can't open `': No such file or directory
gpg: [stdout]: write error: Broken pipe
gpg: [stdout]: write error: Broken pipe
gpg: [stdout]: write error: Broken pipe
gpg: iobuf_flush failed on close: file write error