This appears to have been a transient error in the version of util-linux in a prerelease version of Ubuntu 14.10. The util-linux package in xenial doesn't contain this file, nor does the util-linux package in trusty. Marking resolved.
** Changed in: shadow (Ubuntu) Status: New => Fix Released -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to shadow in Ubuntu. https://bugs.launchpad.net/bugs/1316485 Title: package login 1:4.1.5.1-1.1ubuntu1 failed to install/upgrade: trying to overwrite '/usr/share/man/man8/nologin.8.gz', which is also in package util-linux 2.24.1-1ubuntu1 Status in shadow package in Ubuntu: Fix Released Bug description: the error reportint window just suddenly appeared while the upgrade script run at the background and i browsed in chrome ProblemType: Package DistroRelease: Ubuntu 14.10 Package: login 1:4.1.5.1-1.1ubuntu1 Uname: Linux 3.14.2-031402-generic x86_64 ApportVersion: 2.14.2-0ubuntu2 Architecture: amd64 Date: Tue May 6 10:26:27 2014 DuplicateSignature: package:login:1:4.1.5.1-1.1ubuntu1:trying to overwrite '/usr/share/man/man8/nologin.8.gz', which is also in package util-linux 2.24.1-1ubuntu1 ErrorMessage: trying to overwrite '/usr/share/man/man8/nologin.8.gz', which is also in package util-linux 2.24.1-1ubuntu1 SourcePackage: shadow Title: package login 1:4.1.5.1-1.1ubuntu1 failed to install/upgrade: trying to overwrite '/usr/share/man/man8/nologin.8.gz', which is also in package util-linux 2.24.1-1ubuntu1 UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/shadow/+bug/1316485/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp