*** This bug is a duplicate of bug 1522675 *** https://bugs.launchpad.net/bugs/1522675
I ran into this bug as well, as I tried to build a new Linux kernel as root. Downloading the sources as a regular user worked though. apt-get source linux-image-extra-4.10.0-19-generic W: Download is performed unsandboxed as root as file 'linux_4.10.0-21.23.dsc' couldn't be accessed by user '_apt'. - pkgAcquire::Run (13: Permission denied) -- 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