In /var/lib/dpkg/info/apt.postinst there is a comment that says: # libapt will setup partial/ at runtime
So I wonder if that directory is not meant to exist? It owned by the update-notifier-common package though: $ dlocate /var/lib/update-notifier/package-data-downloads/partial update-notifier-common: /var/lib/update-notifier/package-data-downloads/partial So perhaps it needs more attention? ** Package changed: app-install-data-partner (Ubuntu) => update-notifier (Ubuntu) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1682017 Title: adobe-flashplugin_20170411.1.orig.tar.gz couldn't be accessed by user '_apt'. - pkgAcquire::Run ... To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/update-notifier/+bug/1682017/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs