Error when starting scan about bitnodes

[scriptzteam]

Okay new error ever redis installed:

Writing output to crawl.log, press CTRL+C to terminate..
Traceback (most recent call last):
File "crawl.py", line 459, in
sys.exit(main(sys.argv))
File "crawl.py", line 435, in main
REDIS_CONN.set('crawl:master:state', "starting")
File "/usr/local/lib/python2.7/dist-packages/redis/client.py", line 1055, in set
return self.execute_command('SET', _pieces)
File "/usr/local/lib/python2.7/dist-packages/redis/client.py", line 570, in execute_command
connection.send_command(_args)
File "/usr/local/lib/python2.7/dist-packages/redis/connection.py", line 556, in send_command
self.send_packed_command(self.pack_command(*args))
File "/usr/local/lib/python2.7/dist-packages/redis/connection.py", line 532, in send_packed_command
self.connect()
File "/usr/local/lib/python2.7/dist-packages/redis/connection.py", line 436, in connect
raise ConnectionError(self._error_message(e))
redis.exceptions.ConnectionError: Error 2 connecting to unix socket: /tmp/redis.sock. No such file or directory.

[ayeowch]

The setup is documented in https://github.com/ayeowch/bitnodes/wiki/Provisioning-Bitcoin-Network-Crawler.