Here you go. After looking at the output, I'm guessing you wanted the second command to be lightning-extension, not just "lightning" so I included both below in addition to the output for calendar-google- provider.
apt-cache policy calendar-google-provider calendar-google-provider: Installed: 0.9+nobinonly-0ubuntu2 Candidate: 0.9+nobinonly-0ubuntu2 Version table: *** 0.9+nobinonly-0ubuntu2 0 500 http://us.archive.ubuntu.com jaunty/universe Packages 100 /var/lib/dpkg/status apt-cache policy lightning lightning: Installed: (none) Candidate: 1.2-6 Version table: 1.2-6 0 500 http://us.archive.ubuntu.com jaunty/universe Packages apt-cache policy lightning-extension lightning-extension: Installed: 0.9+nobinonly-0ubuntu2 Candidate: 0.9+nobinonly-0ubuntu2 Version table: *** 0.9+nobinonly-0ubuntu2 0 500 http://us.archive.ubuntu.com jaunty/universe Packages 100 /var/lib/dpkg/status -- thunderbird-bin crashed with SIGSEGV in strcmp() when using Google Provider extension https://bugs.launchpad.net/bugs/383670 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs