当我安装 flashplugin 时，我遇到了问题：
flashplugin-installer: downloading http://archive.canonical.com/pool/partner/a/adobe-flashplugin/adobe-flashplugin_11.2.202.235.orig.tar.gz
Traceback (most recent call last):
File "/usr/lib/update-notifier/package-data-downloader", line 234, in process_download_requests
dest_file = urllib.urlretrieve(files[i])[0]
File "/usr/lib/python2.7/urllib.py", line 93, in urlretrieve
return _urlopener.retrieve(url, filename, reporthook, data)
File "/usr/lib/python2.7/urllib.py", line 239, in retrieve
fp = self.open(url, data)
File "/usr/lib/python2.7/urllib.py", line 207, in open
return getattr(self, name)(url)
File "/usr/lib/python2.7/urllib.py", line 344, in open_http
h.endheaders(data)
File "/usr/lib/python2.7/httplib.py", line 954, in endheaders
self._send_output(message_body)
File "/usr/lib/python2.7/httplib.py", line 814, in _send_output
self.send(msg)
File "/usr/lib/python2.7/httplib.py", line 776, in send
self.connect()
File "/usr/lib/python2.7/httplib.py", …