I have the same problem on Ubuntu 12.04.3 LTS on i386. I have plenty of space both in /tmp and /var/tmp (they're on the same partition):
hactar% LANG= df -h /tmp /var/tmp Filesystem Size Used Avail Use% Mounted on /dev/mapper/hactar--vg-root 120G 107G 7.1G 94% / /dev/mapper/hactar--vg-root 120G 107G 7.1G 94% / I also have the problem that update-guestfs-appliance doesn't work (reported as bug #1263989). Package versions: libguestfs0: 1:1.14.8-1 qemu-kvm: 1.0+noroms-0ubuntu14.12 febootstrap: 3.14-2 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1186228 Title: guestmount does not work To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/libguestfs/+bug/1186228/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs