1、下載yum源
wget http://dev.mysql.com/get/mysql57-community-release-el7-8.noarch.rpm
2、安裝yum源
yum localinstall mysql57-community-release-el7-8.noarch.rpm
3、
yum repolist enabled | grep “mysql.-community.”
4、安裝mysql服務
yum install mysql-community-server
5、啓動mysql服務
systemctl start mysqld
6、查看mysql服務狀態
systemctl status mysqld
7、開機啓動
systemctl enable mysqld
systemctl daemon-reload
8、查看mysql的臨時密碼
grep 'temporary password' /var/log/mysqld.log
配置文件：/etc/my.cnf
日誌文件：/var/log//var/log/mysqld.log
服務啓動腳本：/usr/lib/systemd/system/mysqld.service
socket文件：/var/run/mysqld/mysqld.pid
9、修改my.cnf配置文件
vi /etc/my.cnf
添加 （如果不需要密碼策略，禁用密碼策略）
validate_password = off
添加
character_set_server = utf8
init_connect = ‘SET NAMES utf8’
10、重啓mysql服務
systemctl restart mysqld
11、登錄mysql
mysql -uroot -p
密碼就是（8）查出來的密碼（grep 'temporary password' /var/log/mysqld.log）
12、使用mysql庫
use mysql
13、修改密碼
SET PASSWORD = PASSWORD('your new password');
14、使遠程可以登錄mysql
update user set host = '%' where user ='root'
15、查看結果
select host, user from user;
16、退出
quit
17、查看防火牆配置
service iptables status
如果看不到，那麼系統的防火牆使用的是firewalld
systemctl status firewalld
18、開放3306端口
firewall-cmd --add-port=3306/tcp --permanent
19、重啓防火牆
firewall-cmd --reload