報錯：
Starting MySQL....The server quit without updating PID file ...
查看錯誤日誌
情景1：
120217 15:09:57[ERROR] Can't start server : Bind on unix socket: No such file or directory 120217 15:09:57[ERROR] Do you already have another mysqld server running on socket: /mysql/mysqldir/data/mysql.sock ? 120217 15:09:57[ERROR] Aborting
netstat -an | grep 3306 一把.也未發現異常.
檢查/etc/my.cnf中的socket的配置項，確定mysql.sock的文件位置是否正確。
最後從mysql安裝目錄下重新複製一個配置文件到/etc/my.cnf
修改相應參數.於是問題解決
情景2：
/mysql/mysqldir/bin/mysqld: Table 'mysql.plugin' doesn't exist [ERROR] Can't open the mysql.plugin table. Please run mysql_upgrade to create it.
原因：編譯安裝後忘記初始化表.
解決：運行mysql_install_db