Traceback (most recent call last):
  File "/usr/bin/software-center", line 47, in <module>
    import softwarecenter.log
  File "/usr/share/software-center/softwarecenter/log.py", line 103, in <module>
    backupCount=5)
  File "/usr/lib/python2.7/logging/handlers.py", line 118, in __init__
    BaseRotatingHandler.__init__(self, filename, mode, encoding, delay)
  File "/usr/lib/python2.7/logging/handlers.py", line 65, in __init__
    logging.FileHandler.__init__(self, filename, mode, encoding, delay)
  File "/usr/lib/python2.7/logging/__init__.py", line 893, in __init__
    StreamHandler.__init__(self, self._open())
  File "/usr/lib/python2.7/logging/__init__.py", line 912, in _open
    stream = open(self.baseFilename, self.mode)
IOError: [Errno 13] Permission denied: '/home/username/.cache/software-center/software-center.log'