运行fab服务器时，我收到错误：
$ fab server
* Running on http://0.0.0.0:80/
Traceback (most recent call last):
File "/usr/local/lib/python2.7/site-packages/fabric/main.py", line 743, in main
*args, **kwargs
File "/usr/local/lib/python2.7/site-packages/fabric/tasks.py", line 419, in execute
results['<local-only>'] = task.run(*args, **new_kwargs)
File "/usr/local/lib/python2.7/site-packages/fabric/tasks.py", line 174, in run
return self.wrapped(*args, **kwargs)
File "/Users/jonathantuck/Desktop/website/fabfile.py", line 8, in server
app.run(port = 80, debug = True, host = '0.0.0.0')
File "/usr/local/lib/python2.7/site-packages/flask/app.py", line 772, in run
run_simple(host, port, self, **options)
File "/usr/local/lib/python2.7/site-packages/werkzeug/serving.py", line 706, in run_simple
test_socket.bind((hostname, port))
File "/usr/local/Cellar/python/2.7.8/Frameworks/Python.framework/Versions/2.7/lib/python2.7/socket.py", line 224, in meth
return getattr(self._sock,name)(*args)
socket.error: [Errno 13] Permission denied
不确定我做错了什么。是我如何配置它？我用Google搜索，无法找到任何东西。我有什么想法我做错了吗？
编辑（运行sudo时）：
$sudo fab server
* Running on http://0.0.0.0:80/
Traceback (most recent call last):
File "/usr/local/lib/python2.7/site-packages/fabric/main.py", line 743, in main
*args, **kwargs
File "/usr/local/lib/python2.7/site-packages/fabric/tasks.py", line 419, in execute
results['<local-only>'] = task.run(*args, **new_kwargs)
File "/usr/local/lib/python2.7/site-packages/fabric/tasks.py", line 174, in run
return self.wrapped(*args, **kwargs)
File "/Users/jonathantuck/Desktop/website/fabfile.py", line 8, in server
app.run(port = 80, debug = True, host = '0.0.0.0')
File "/usr/local/lib/python2.7/site-packages/flask/app.py", line 772, in run
run_simple(host, port, self, **options)
File "/usr/local/lib/python2.7/site-packages/werkzeug/serving.py", line 706, in run_simple
test_socket.bind((hostname, port))
File "/usr/local/Cellar/python/2.7.8/Frameworks/Python.framework/Versions/2.7/lib/python2.7/socket.py", line 224, in meth
return getattr(self._sock,name)(*args)
socket.error: [Errno 48] Address already in use
编辑2（运行＆＃34; sudo lsof -i：80＆＃34;）：
$ sudo lsof -i :80
Password:
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
Google 8522 jonathantuck 84u IPv4 0x6d0fd4be8004b79f 0t0 TCP 10.0.13.151:51920->stackoverflow.com:http (CLOSE_WAIT)
Google 8522 jonathantuck 128u IPv4 0x6d0fd4be7dce379f 0t0 TCP 10.0.13.151:51913->stackoverflow.com:http (CLOSE_WAIT)
Google 8522 jonathantuck 129u IPv4 0x6d0fd4be7ef83f87 0t0 TCP 10.0.13.151:51915->yv-in-f102.1e100.net:http (ESTABLISHED)
Google 8522 jonathantuck 142u IPv4 0x6d0fd4be7dce079f 0t0 TCP 10.0.13.151:51916->a184-26-136-74.deploy.static.akamaitechnologies.com:http (ESTABLISHED)
httpd 8721 root 5u IPv6 0x6d0fd4be722abb3f 0t0 TCP *:http (LISTEN)
httpd 8722 _www 5u IPv6 0x6d0fd4be722abb3f 0t0 TCP *:http (LISTEN)
httpd 9206 _www 5u IPv6 0x6d0fd4be722abb3f 0t0 TCP *:http (LISTEN)
httpd 9207 _www 5u IPv6 0x6d0fd4be722abb3f 0t0 TCP *:http (LISTEN)
httpd 9208 _www 5u IPv6 0x6d0fd4be722abb3f 0t0 TCP *:http (LISTEN)
$ sudo lsof -i :80
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
Google 8522 jonathantuck 110u IPv4 0x6d0fd4be8004b79f 0t0 TCP 10.0.13.151:51967->a184-26-136-56.deploy.static.akamaitechnologies.com:http (ESTABLISHED)
Google 8522 jonathantuck 129u IPv4 0x6d0fd4be7ef83f87 0t0 TCP 10.0.13.151:51915->yv-in-f102.1e100.net:http (ESTABLISHED)
httpd 8721 root 5u IPv6 0x6d0fd4be722abb3f 0t0 TCP *:http (LISTEN)
httpd 8722 _www 5u IPv6 0x6d0fd4be722abb3f 0t0 TCP *:http (LISTEN)
httpd 9206 _www 5u IPv6 0x6d0fd4be722abb3f 0t0 TCP *:http (LISTEN)
httpd 9207 _www 5u IPv6 0x6d0fd4be722abb3f 0t0 TCP *:http (LISTEN)
httpd 9208 _www 5u IPv6 0x6d0fd4be722abb3f 0t0 TCP *:http (LISTEN)