Centos7.X 安装mysql5.7.2X教程

1. 新安装的 centos7 系统需要 配置IP

   
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2. 修改配置

   
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执行命令 - 重启网络服务 - 获取IP

systemctl restart network
ip addr  //获取IP地址

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4. 远程工具 CRT 或者 xshell 连接（随个人喜好=。=）

//安装 wget
yum -y install wget
yum -y install vim

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5. 安装mysql

wget http://repo.mysql.com/mysql57-community-release-el7-8.noarch.rpm
rpm -ivh mysql57-community-release-el7-8.noarch.rpm
yum -y install mysql-server

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6. 启动mysql服务

service mysqld restart

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7. 重置密码

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

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mysql -u root -p  回车
密码：xxx

#更改密码策略为LOW
set global validate_password_policy=0;
#更改密码长度
set global validate_password_length=0;

alter user 'root'@'localhost' identified by '123456';
CREATE USER 'ab'@'%' IDENTIFIED BY '123456';
grant all on *.* to 'ab'@'%' identified by '123456'  with grant option;
update mysql.user set host='%' where user='root';
flush privileges;
exit;
service mysqld restart

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8. 关闭防火墙

firewall-cmd --state //查看防火墙状态
systemctl stop firewalld.service //停止firewall
systemctl disable firewalld.service //禁止firewall开机启动

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Over.~~ =。=

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补充一下：

配置文件：/etc/my.cnf 
日志文件：/var/log/var/log/mysqld.log 
服务启动脚本：/usr/lib/systemd/system/mysqld.service 
socket文件：/var/run/mysqld/mysqld.pid