先执行如下命令:

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lsof -i:端口号

会有类似下面的结果：

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COMMAND     PID       USER   FD   TYPE             DEVICE SIZE/OFF NODE NAME
WebProces 42624 davidzhang    5u  IPv4 0x907152bbf7b2a875      0t0  TCP localhost:64438->localhost:radan-http (ESTABLISHED)
WebProces 42624 davidzhang   10u  IPv4 0x907152bbf7b64a05      0t0  TCP localhost:64439->localhost:radan-http (ESTABLISHED)

然后执行：

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kill -9 42624

结束进程就搞定了