rh5.4 rpm mysql5.5.19的问题Starting MySQL...The server quit without updating PID file

Starting MySQL.The server quit without updating PID file (/var/lib/mysql/TES

报错：

Starting MySQL...The server quit without updating PID file

查看错误日志

情景1：

 

110206 12:58:35 [ERROR] Can't start server : Bind on unix socket: No such file or directory

110206 12:58:35 [ERROR] Do you already have another mysqld server running on socket: /mysql/mysqldir/data/mysql.sock ?

110206 12:58:35 [ERROR] Aborting

于是ps -ef | grep mysql 一把.未发现有mysqld.

netstat -an | grep 3306 一把.也未发现异常.

最后从mysql安装目录下重新复制一个配置文件到/etc/my.cnf

修改相应参数.于是问题解决

情景2：

 /mysql/mysqldir/bin/mysqld: Table 'mysql.plugin' doesn't exist

 [ERROR] Can't open the mysql.plugin table. Please run my        sql_upgrade to create it.

原因：编译安装后忘记初始化表.

解决：运行mysql_install_db