yum list installed | grep mysql
yum -y remove mysql-libs.x86_64
wget http://repo.mysql.com/mysql-community-release-el6-5.noarch.rpm
rpm -ivh mysql-community-release-el6-5.noarch.rpm
yum install mysql-community-server -y
service mysqld start
mysql -u root;
use mysql;
update user set password=PASSWORD("这里输入root用户密码") where User='root';
flush privileges;
chkconfig --list | grep mysqld
chkconfig mysqld on
mysql_secure_installation