准备启动mysql时发现出错了。

MySQL manager or server PID file could not be found! [FAILED]
Starting MySQL…………………………….. [FAILED]

以为是selinux的问题，于是setenforce 0 之后再启动，发现还是出错。

查询 /var/lib/mysql/hostname.err 提示如下：

070130 17:59:41 mysqld started
070130 17:59:42 [ERROR] /usr/sbin/mysqld: Table ‘./mysql/user’ is marked as crashed and should be repaired
070130 17:59:42 [ERROR] /usr/sbin/mysqld: Table ‘./mysql/user’ is marked as crashed and should be repaired
070130 17:59:42 [ERROR] Fatal error: Can’t open and lock privilege tables: Table ‘./mysql/user’ is marked as crashed and should be repaired
070130 17:59:42 mysqld ended

搜索后发现可以通过 以下办法解决：
先加上启动参数
service mysql start –skip-grant-tables
Starting MySQL [ OK ]

启动成功后

就可以进行修复 mysql/user 表了，

root@iplaylinux [/var/lib/mysql/mysql]# mysqlcheck -r mysql user
mysql.user
warning : Number of rows changed from 1558 to 1556
status : OK

修复完毕，重启mysql
root@iplaylinux [/var/lib/mysql/mysql]# service mysql restart
Shutting down MySQLs [ OK ]
Starting MySQL [ OK ]

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