Comment 6 for bug 993048

since you are being learn-resistent, here is the key: http://keyserver.ubuntu.com:11371/pks/lookup?search=0x14C966D8AC5F7A9119DD574315331454B72FD7EC&op=index Do you know how to click on a link?

But I'm afraid you might still not believe me, so here is the output from the command line (outside the chroot)

$ sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 15331454B72FD7EC
Executing: gpg --ignore-time-conflict --no-options --no-default-keyring --secret-keyring /etc/apt/secring.gpg --trustdb-name /etc/apt/trustdb.gpg --keyring /etc/apt/trusted.gpg --primary-keyring /etc/apt/trusted.gpg --keyserver keyserver.ubuntu.com --recv-keys 15331454B72FD7EC
gpg: requesting key B72FD7EC from hkp server keyserver.ubuntu.com
gpg: key B72FD7EC: "Launchpad PPA for Rolf Leggewie" not changed
gpg: Total number processed: 1
gpg: unchanged: 1

This ticket is now hopeless. Thanks, dude. You should abstain from stuff you don't understand. There is no race to close tickets, there is a race to fix problems. And you (almost) prevented fixing one. Congratulate yourself and ask more questions in the future.

I'll open a new ticket and hope you will be embarassed enough to stay out of it.