# 安装MySQL的yum源，下面是RHEL6系列的下载地址

rpm -Uvh http://dev.mysql.com/get/mysql-community-release-el6-5.noarch.rpm

# 安装yum-config-manager

yum install yum-utils -y

# 禁用MySQL5.6的源

yum-config-manager --disable mysql56-community

# 启用MySQL5.7的源

yum-config-manager --enable mysql57-community-dmr

# 用下面的命令查看是否配置正确

yum repolist enabled | grep mysql

# 安装MySQL5.7

yum -y install mysql-community-server

setenforce 0

sed -i '/^SELINUX=/c\SELINUX=disabled' /etc/selinux/config

# 启动mysqld，启动之前先修改/etc/my.cnf配置文件，本文用默认的配置。

service mysqld start