CentOS 6.6下载地址
http://mirrors.aliyun.com/centos/6.6/isos/x86_64/ （minimal版）
MySQL 5.6下载地址
http://cdn.mysql.com/Downloads/MySQL-5.6/MySQL-server-5.6.23-1.rhel5.x86_64.rpm
http://cdn.mysql.com/Downloads/MySQL-5.6/MySQL-client-5.6.23-1.rhel5.x86_64.rpm
使用wget 直接在CentOS上下载MySQL（server、client）
若提示wget：command not found，则需先安装wget。
yum install wget -y
wget安装好后，接下来即可继续MySQL下载
wget http://cdn.mysql.com/Downloads/MySQL-5.6/MySQL-server-5.6.23-1.rhel5.x86_64.rpm
wget http://cdn.mysql.com/Downloads/MySQL-5.6/MySQL-client-5.6.23-1.rhel5.x86_64.rpm
安装时若提Failed depaendencies:/usr/bin/perl is needed by MySQL-.......，则需安装perl
yum install perl -y
安装：
rpm -ivh MySQL-server-5.6.23-1.rhel5.x86_64.rpm
rpm -ivh MySQL-server-5.6.23-1.rhel5.x86_64.rpm
conflicts with file from package mysql-libs-5.1.....
包冲突，需将老版本的包卸载（删除）。
rpm -e mysql-libs --nodeps
继续安装。。。
安装完毕，启动数据库
service mysql start
查看初始密码
cat /root/.mysql_secret
设置密码
mysql -uroot -p
粘贴查看到的初始密码
set password for 'root'@'localhost'=password('newpass');
test->show databases;
关闭mysql数据库
service mysql stop
卸载mysql数据库
rpm -e MySQL-server
rpm -e MySQL-client
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