Command: Query port usage

Windows 7:

1. Open cmd.exe2.1 Query all ports's usageeg: netstat -ano2.2 Query one port's usageeg: netstat -ano|findstr "8080"3. If port 8080 used by process which has an id: 15312, use command: tasklist|findstr "15312" to see detail of the process.4. To kill the process if you want.

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Mac OS X 10.9:

1. Open command terminal.2. Query one port's usage:eg: lsof -i tcp:80803. Find the process id(PID), then use command: kill PID to kill the process using port 8080.