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mysql رو ریست که می کنم این خطا رو میده :


Waiting for “mysql” to restart ………………………………………… ………………………………………… …………………………waiting for “mysql” to initialize …………………………………finished.

The service “mysql” failed to start with the message: mysql is not running
/usr/bin/mysqladmin: connect to server at 'localhost' failed
error: 'Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2)'
Check that mysqld is running and that the socket: '/var/lib/mysql/mysql.sock' exists!

Startup Log
Starting MySQL.The server quit without updating PID file (/var/lib/mysql/server.apelecomp.com.pid).[FAILED]

Log Messages
141222 1554 mysqld_safe mysqld from pid file /var/lib/mysql/server.apelecomp.com.pid ended
2014-12-22 1554 4648 [ERROR] /usr/sbin/mysqld: Table './mysql/db' is marked as crashed and last (automatic?) repair failed
141222 1553 mysqld_safe Starting mysqld daemon with databases from /var/lib/mysql
141222 15:46:07 mysqld_safe mysqld from pid file /var/lib/mysql/server.apelecomp.com.pid ended
2014-12-22 15:46:07 3682 [ERROR] /usr/sbin/mysqld: Table './mysql/db' is marked as crashed and last (automatic?) repair failed
141222 15:46:07 mysqld_safe Starting mysqld daemon with databases from /var/lib/mysql
141222 15:41:08 mysqld_safe mysqld from pid file /var/lib/mysql/server.apelecomp.com.pid ended
2014-12-22 15:41:08 2794 [ERROR] /usr/sbin/mysqld: Table './mysql/db' is marked as crashed and last (automatic?) repair failed
141222 15:41:08 mysqld_safe Starting mysqld daemon with databases from /var/lib/mysql
141222 15:40:35 mysqld_safe mysqld from pid file /var/lib/mysql/server.apelecomp.com.pid ended
2014-12-22 15:40:35 1988 [ERROR] /usr/sbin/mysqld: Table './mysql/db' is marked as crashed and last (automatic?) repair failed
141222 15:40:33 mysqld_safe Starting mysqld daemon with databases from /var/lib/mysql
141222 15:36:17 mysqld_safe mysqld from pid file /var/lib/mysql/server.apelecomp.com.pid ended

mysql has failed. Please contact your system administrator if the service does not automagically recover.