mysqld_safe mysqld from pid file /var/run/mysqld/mysqld.pid ended

http://blog.csdn.net/ly_feng/article/details/7917500

解决办法 
vi /etc/my.cnf 
把 
[mysqld_safe] 
err-log=/var/log/mysqld.log 
pid-file=/var/lib/run/mysql/mysqld.pid 
改成 
[mysqld_safe] 
err-log=/var/log/mysqld.log 
pid-file=/var/lib/mysql/mysqld.pid