*** This bug is a duplicate of bug 1522675 *** https://bugs.launchpad.net/bugs/1522675
I can confirm the bug, Ubuntu 16.04. I know that this is a duplicate of bug #1522675 (not related to synaptic but to apt itself as noted before), but I think that we have two different issues here. The first is: W: Can't drop privileges for downloading as file '/var/lib/update- notifier/package-data-downloads/partial/andale32.exe' couldn't be accessed by user '_apt'. - pkgAcquire::Run (13: Permission denied) This happens as the directory is not owned by _apt: cat /etc/passwd | grep apt _apt:x:105:65534::/nonexistent:/bin/false ls -la /var/lib/update-notifier/package-data-downloads/ total 12 drwxr-xr-x 3 root root 4096 gen 8 17:50 . drwxr-xr-x 4 root root 4096 gen 8 17:50 .. drwxr-xr-x 2 root root 4096 gen 8 17:50 partial The manual workaround that worked for me and do no create a huge security hole is: chown _apt /var/lib/update-notifier/package-data-downloads/partial/ Hopefully https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=813786 will fix the issue but can't say till it hit mainstream as I'm a standard user with a LTS installation. Anyway, and this is the seconde issue, ttf-mscorefonts-installer will refuse to work anyway as ttf-mscorefonts- installer_3.4+nmu1ubuntu2_all.deb is somehow broken getting a redirect from Sourceforge: curl -kis http://downloads.sourceforge.net/corefonts/arial32.exe | grep "^Location: " Location: http://downloads.sourceforge.net/project/corefonts/the%20fonts/final/arial32.exe That contains a space that will make the subsequent request: E: Failed to fetch https://netcologne.dl.sourceforge.net/project/corefonts/the fonts/final/arial32.exe The HTTP server sent an invalid Content-Range header E: Download Failed Installing ttf-mscorefonts-installer_3.6_all.deb from Debian fix the issue so it really has to do with some scripting inside the package (postinst?). ** Bug watch added: Debian Bug tracker #813786 http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=813786 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1543280 Title: Synaptic fails with "W: Can't drop privileges for downloading as file '/root/.synaptic/tmp//tmp_sh' couldn't be accessed by user '_apt'. - pkgAcquire::Run (13: Permission denied)" To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/aptitude/+bug/1543280/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs