Can't connect to local MySQL server through socket

突然发现linux服务器上的网站登录不了了，用SSH登录linux查询下问题，发现mysql没有启动，报Can't connect to local MySQL server through socket

用service mysqld start启动不了，，

Timeout error occurred trying to start MySQL Daemon.
Starting MySQL:                                            [FAILED]

又变更了一下mysql的权限，

 #chown -R mysql:mysql /var/lib/mysql

然后从 /etc/rc.d/init.d/mysqld start目录启动

OK了，
Starting MySQL:                                            [  OK  ]