安装wget

yum -y install wget

查看是否安装

rpm -qa|grep "wget"

MySQL安装

1、下载MySQL源安装包

wget http://dev.mysql.com/get/mysql57-community-release-el7-8.noarch.rpm

2、安装MySQL源

yum localinstall mysql57-community-release-el7-8.noarch.rpm 

3、检查MySQL源是否安装成功

yum repolist enabled | grep "mysql.*-community.*"

4、安装MySQL

yum install mysql-community-server

5、启动服务并设置开机自启

# 启动服务
systemctl start mysqld
# 设置开机自启
systemctl enable mysqld
systemctl daemon-reload

6、修改密码

1、查看密码

grep 'temporary password' /var/log/mysqld.log

【注意：将红框里面的临时密码复制下来】

2、登录

mysql -uroot -p

3、修改密码

设置密码等级
想要设置密码简单点，就设置如下配置

set global validate_password_policy=0;
set global validate_password_length=4;

set password=password("root")

退出去用新密码重新进来测试一下

7、设置远程登录

【第一个root：用户，第二个root：密码】

GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY 'root' WITH GRANT OPTION;

刷新

flush privileges;

8、查看用户名和密码

select user,host,authentication_string from mysql.user;