Centos 6.5 安装MySQL
yum -y install mysql-server启动mysql数据库service mysqld start初始化mysql数据库（默认root的密码为空，按提示一步步完成）/usr/bin/mysql_secure_installation将mysql加入开机启动chkconfig mysqld on允许远程登录mysql首先登录mysql数据，然后执行下面两行语句：GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY 'hadoop' WITH GRANT OPTION;flush privileges;
ok ,安装完成
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