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A server is already running. Check tmp/pids/server.pid.

A server is already running. Check  tmp/pids/server.pid.

 

把server.pid删除;

学习了:

http://stackoverflow.com/questions/24627701/a-server-is-already-running-check-tmp-pids-server-pid-exiting-rails

A server is already running. Check tmp/pids/server.pid.