2014-07-22 17:04:34,421 INFO apt version: '0.9.9.1~ubuntu1'
2014-07-22 17:04:34,421 INFO release-upgrader version '0.220.2' started
2014-07-22 17:04:34,441 DEBUG screen returned: 'No Sockets found in /var/run/screen/S-root.

'
2014-07-22 17:04:34,441 INFO re-exec inside screen: '['screen', '-e', '\\0\\0', '-L', '-c', 'screenrc', '-S', 'ubuntu-release-upgrade-screen-window', '/tmp/ubuntu-release-upgrader-r_yjnr/trusty', '--mode=server$