It looks like add-apt-repository doesn't seem to set the http_proxy variable for GPG, so if you're behind a proxy the keyserver is always 'down'. The process hangs and the only signal it seems to respond to is -9 (C-\).
It looks like add-apt-repository doesn't seem to set the http_proxy variable for GPG, so if you're behind a proxy the keyserver is always 'down'. The process hangs and the only signal it seems to respond to is -9 (C-\).