This points to a filesystem problem, not to a bug in the shadow package. If your filesystem is intact, you should never get a "device or resource busy" error when unpacking a new package.
** Changed in: shadow (Ubuntu) Status: New => Invalid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1516618 Title: package login 1:4.1.5.1-1.1ubuntu4 failed to install/upgrade: unable to install new version of `/bin/su': Device or resource busy To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/shadow/+bug/1516618/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs