2018-09-09 20:46:08,579 INFO Using config files '['./DistUpgrade.cfg.trusty']'
2018-09-09 20:46:08,580 INFO uname information: 'Linux unla-WEB 3.19.0-25-generic #26~14.04.1-Ubuntu SMP Fri Jul 24 21:16:20 UTC 2015 x86_64'
2018-09-09 20:46:08,964 INFO apt version: '1.0.1ubuntu2.10'
2018-09-09 20:46:08,965 INFO python version: '3.4.0 (default, Jun 19 2015, 14:20:21) 
[GCC 4.8.2]'
2018-09-09 20:46:08,967 INFO release-upgrader version '16.04.23' started
2018-09-09 20:46:08,979 INFO locale: 'en_US' 'UTF-8'
2018-09-09 20:46:09,000 DEBUG screen returned: 'No Sockets found in /var/run/screen/S-root.

'
2018-09-09 20:46:09,000 INFO re-exec inside screen: '['screen', '-e', '\\0\\0', '-L', '-c', 'screenrc', '-S', 'ubuntu-release-upgrade-screen-window', '/tmp/ubuntu-release-upgrader-r1ibh53k/xenial', '--mode=server', '--frontend=DistUpgradeViewText']'