MySQL 5.7详细安装步骤

1)、打开 mirrors.aliyun.com，选择centos的系统，点击帮助

2)、执行命令：yum install wget -y

3)、改变某些文件的名称

mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backup

4)、执行更换yum源的命令

wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-6.repo

5)、更新本地缓存

yum clean all

yum makecache

yum list installed | grep mysql

yum -y remove mysql-libs.x86_64

yum install wget -y

wget dev.mysql.com/get/mysql-community-release-el6-5.noarch.rpm

 yum install mysql-community-release-el6-5.noarch.rpm -y

原文件：

修改之后：

yum install mysql-community-server -y

#启动之前需要生成临时密码，需要用到证书，可能证书过期，需要进行更新操作
yum update -y
#启动mysql服务
service mysqld start
#设置mysql开机启动
chkconfig mysqld on

grep "password" /var/log/mysqld.log

mysql -uroot -p
#输入密码

set global validate_password_policy=0;
set global validate_password_length=1;
ALTER USER 'root'@'localhost' IDENTIFIED BY '123456';

grant all privileges on *.* to 'root'@'%' identified by '123456' with grant option;
flush privileges;

#在[mysqld]部分添加：
character-set-server=utf8
#在文件末尾新增[client]段，并在[client]段添加：
default-character-set=utf8