解決MySQL is running but PID file could not be found

執行：sudo mysql.server status

報錯：ERROR! MySQL is running but PID file could not be found

原因：mysql進程異常

解決辦法：找到並kill掉所有關於mysql的進程

執行==>ps -ef | grep mysql 查看相關進程

執行==>kill 進程號

啟動MySQL服務

    sudo /usr/local/mysql/support-files/mysql.server start

停止MySQL服務

    sudo /usr/local/mysql/support-files/mysql.server stop

重啟MySQL服務

    sudo /usr/local/mysql/support-files/mysql.server restart