I ran into this today and the problem turned out to be /tmp: # ls -ld /tmp drwxrwxr-x 11 ubuntu ubuntu 4096 Aug 24 00:23 /tmp
This fixed it: # chown root:root /tmp # chmod 1777 /tmp I don't know how /tmp got in that state on my server (it's a fairly fresh install of 16.04) but perhaps that's the underlying problem for other people too. -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to apt in Ubuntu. https://bugs.launchpad.net/bugs/1583102 Title: Could not execute 'apt-key' to verify signature (is gnupg installed?) Status in apt package in Ubuntu: Confirmed Bug description: After upgrading to 16.04 I'm getting this error for all my apt sources. This seems different to both https://bugs.launchpad.net/ubuntu/+source/apt/+bug/1524196 (since I don't get the "Couldn't create tempfiles for splitting up /var/lib/apt/lists/archive.ubuntu.com_ubuntu_dists_xenial- updates_InRelease" errors) and https://bugs.launchpad.net/ubuntu/+source/apt/+bug/1577926 (since apt- key run by itself fails too). Downgrading to apt=1.0.10.2ubuntu2 fixed the problem so it seems to be related to recent changes in apt. Thanks! To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/apt/+bug/1583102/+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
