ERROR 2002 (HY000): Can't connect to local MySQL server.

Are you are getting following error while running MySQL server?

ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (111)


Simply follow these steps:-

-Go to MySQL directory
   root@localhost:[/]cd /var/lib/mysql
   root@localhost:[/var/lib/mysql]

-Rename mysql.sock file to mysql.sock_old
   root@localhost:[/var/lib/mysql]mv mysql.sock mysql.sock_old

-Restart MySQL server.
   root@localhost:[/var/lib/mysql]service mysqld restart
      OR
    root@localhost:[/var/lib/mysql]/etc/init.d/mysqld restart