Traceback (most recent call last):
  File "/usr/share/unattended-upgrades/unattended-upgrade-shutdown", line 107, in <module>
    format="%(asctime)s %(levelname)s - %(message)s")
  File "/usr/lib/python2.7/logging/__init__.py", line 1519, in basicConfig
    hdlr = FileHandler(filename, mode)
  File "/usr/lib/python2.7/logging/__init__.py", line 897, in __init__
    StreamHandler.__init__(self, self._open())
  File "/usr/lib/python2.7/logging/__init__.py", line 916, in _open
    stream = open(self.baseFilename, self.mode)
IOError: [Errno 2] No such file or directory: '/var/log/unattended-upgrades/unattended-upgrades-shutdown.log'