MySQL cannot boot: ERROR 2002 (HY000): Can ' t connect to local MySQL server through socket

PS aux |grep MySQL

Kill all the listed processes, and then restart

Service MySQL Start

The reason may be mysqld did not start; service mysqld start.

This problem may persist because the configuration file is not correct.

Modify the/USR/MY.CNF (typically/ETC/MY.CNF)

[Mysqld]
Datadir=/usr/local/mysql/data
Socket=/var/lib/mysql/mysql.sock

[Mysql.server]
User=mysql
Basedir=/usr/local/mysql

If There is not currently a section called [Client], add one at the bottom of the file and copy the socket= line under the [MYSQLD] section such as:
[Client]
Socket=/var/lib/mysql/mysql.sock

Other questions:

1. Check the/ETC/RC.D/INIT.D/MYSQLD status first to see if M y S Q L has been started.
Also see if it is a permission issue.
2. Determine if your mysql.sock is in that position,
Mysql-u your MySQL user name-p-s/var/lib/mysql/mysql.sock
3, if it is a permission problem, change the permissions first #chown-R mysql:mysql/var/lib/mysql
[[email protected] ~]#/etc/init.d/mysqld start
Start MySQL: [OK]
[Email protected] ~]# mysql-uroot–p

Ext.: http://www.cnblogs.com/visi_zhangyang/archive/2012/03/05/2380531.html

MySQL cannot boot: ERROR 2002 (HY000): Can ' t connect to local MySQL server through socket