Hi All, I been using virt-builder to create testing VMs (most ubuntu) for a while, and it works great. But when I cloned the git repo today and found the process becoming extremely slow, please see the output below. log that produced by pre-installed vendor package: virt-builder ubuntu-14.04 --firstboot-command 'useradd -m -p "" myan; chage -d 0 myan; usermod -aG sudo myan;' [ 3.0] Downloading: http://libguestfs.org/download/builder/ubuntu-14.04.xz [ 4.0] Planning how to build this image [ 4.0] Uncompressing [ 6.0] Opening the new disk [ 11.0] Setting a random seed [ 11.0] Installing firstboot command: [1] useradd -m -p "" myan; chage -d 0 myan; usermod -aG sudo myan; [ 11.0] Setting passwords virt-builder: Setting random password of root to 5bRx9fpQ7kjPh0Dd [ 12.0] Finishing off Output file: ubuntu-14.04.img Output size: 4.0G Output format: raw Total usable space: 2.9G Free space: 2.0G (69%) log that produced by git master: ~/vm$../work/libguestfs/run virt-builder ubuntu-14.04 --firstboot-command 'useradd -m -p "" myan; chage -d 0 myan; usermod -aG sudo myan;' [ 0.4] Downloading: file:///home/myan/work/libguestfs/builder/website/ubuntu-14.04.xz [ 1.7] Planning how to build this image [ 1.7] Uncompressing [ 4.4] Opening the new disk [ 628.3] Setting a random seed [ 628.4] Installing firstboot command: useradd -m -p "" myan; chage -d 0 myan; usermod -aG sudo myan; [ 628.4] Setting passwords virt-builder: Setting random password of root to owA2CFqJeDYT92Sq [ 629.4] Finishing off Output file: ubuntu-14.04.img Output size: 4.0G Output format: raw Total usable space: 2.9G Free space: 2.0G (69%) Turning on debug shows that it spent most of time spinning here: [...] /sbin/dhclient-script: 31: /sbin/dhclient-script: cannot open /etc/fstab: No such file RTNETLINK answers: File exists [...] Any idea what's the problem or is it a known issue ? Thanks. Miao