MySQL8 download, start, configure, verify

一、下载MySQL 8.0

cd /usr/local
mkdir mysql
cd mysql
wget https://repo.mysql.com//mysql80-community-release-el7-1.noarch.rpm

二、 安装

rpm -ivh mysql80-community-release-el7-1.noarch.rpm
yum clean all
yum makecache
sudo yum install mysql-server --nogpgcheck

三、启动、配置

3.1. 启动

systemctl start mysqld.service

3.2. 配置

3.2.1. 设置开机启动

systemctl enable mysqld.service

3.2.2 查看初始密码

cat /var/log/mysqld.log | grep password

可以看到密码是 tgji-Za4l2ON

3.2.3. 连接数据库、输入密码

回车后输入密码

mysql -u root -p

3.2.4. 修改密码

Mysql Do not operate without changing the password.The set password requires uppercase and lowercase numbers and special characters,达到8位以上.Set this first and then change the password rules.

alter user 'root'@'localhost' IDENTIFIED BY '[email protected]';

3.2.5. 设置密码的规则

Change the password level to low,And the minimum length is 6.Then you can reset it to the desired password

set global validate_password.policy=LOW;
set global validate_password.length=6;

View password setting rules
SHOW VARIABLES LIKE 'validate_password%;
±-------------------------------------±-------+
| Variable_name | Value |
±-------------------------------------±-------+
| validate_password.check_user_name | ON |
| validate_password.dictionary_file | |
| validate_password.length | 8 |
| validate_password.mixed_case_count | 1 |
| validate_password.number_count | 1 |
| validate_password.policy | MEDIUM |
| validate_password.special_char_count | 1 |
±-------------------------------------±-------+
————————————————

关于 mysql 密码策略相关参数;
1）validate_password_length 固定密码的总长度;
2）validate_password_dictionary_file 指定密码验证的文件路径;
3）validate_password_mixed_case_count 整个密码中至少要包含大/小写字母的总个数;
4）validate_password_number_count 整个密码中至少要包含阿拉伯数字的个数;
5）validate_password_special_char_count 整个密码中至少要包含特殊字符的个数;
6）validate_password_policy 指定密码的强度验证等级,默认为 MEDIUM;

• LOW：只验证长度;
• MEDIUM：验证长度、数字、大小写、特殊字符;
• STRONG：验证长度、数字、大小写、特殊字符、字典文件;

3.2.5 remove accessIP限制

use mysql;
update user set host='%' where user = 'root';
flush privileges;

3.2.6 关闭防火墙

service firewalld stop

四、navicat连接测试