query: Unable to get package manager to work in Ubuntu 11.04
positive_passages.docid: 1520
positive_passages.text: How to install software or upgrade from an old unsupported release?
negative_passages.docid: 73357
negative_passages.text: Every package "has no installation candidate"
negative_passages.docid: 20398
negative_passages.text: dpkg broken after 15.04 upgrade fail
negative_passages.docid: 44209
negative_passages.text: Problem with update-manager: No module named 'apt_pkg' in Ubuntu 13.10, having installed Python 3.4 on /usr/local/lib
negative_passages.docid: 73668
negative_passages.text: What's the difference between package managers?
negative_passages.docid: 34069
negative_passages.text: Why am I getting authentication errors for packages from an Ubuntu repository?
negative_passages.docid: 31892
negative_passages.text: New "Ubuntu Software" not working (16.04)
negative_passages.docid: 62476
negative_passages.text: E: Package '' has no installation candidate
negative_passages.docid: 152823
negative_passages.text: PPAs will not install "sudo: add-apt-repository: command not found"
negative_passages.docid: 102559
negative_passages.text: How to install package from newer distribution?
negative_passages.docid: 43579
negative_passages.text: I cannot install new packages: "Could not get lock /var/lib/dpkg/lock"
negative_passages.docid: 139545
negative_passages.text: Troubleshooting Packaging Error of General function failure?
negative_passages.docid: 139458
negative_passages.text: How to download packages from a command-line given repository?
negative_passages.docid: 74838
negative_passages.text: Lost/Deleted dpkg (package manager for Debian). How do I get it back?
negative_passages.docid: 144507
negative_passages.text: No facility exists in Update Manager to upgrade to a new version, why?
negative_passages.docid: 30588
negative_passages.text: Unable to locate package
negative_passages.docid: 32389
negative_passages.text: "cannot access archive: No such file or directory" when installing a package using dpkg