更新密钥

rpm --import https://repo.mysql.com/RPM-GPG-KEY-mysql-2022

安装Mysql yum库

rpm -Uvh http://repo.mysql.com//mysql57-community-release-el7-7.noarch.rpm

yum安装Mysql

yum -y install mysql-community-server

设置开机自启

systemctl start mysqld
systemctl enable mysqld
systemctl status mysqld // 检查Mysql服务状态

关闭防火墙

systemctl stop firewalld
​
systemctl disable firewalld

Linux有一个安全模块SELinux，用以限制用户和程序的相关权限，来确保系统的安全稳定。

vi /etc/sysconfig/selinux
​
SELINUX=disabled

查询默认密码

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

登录客户端

第一次启动mysql，会在日志文件中生成root用户的一个随机密码，使用下面命令查看该密码。

mysql -uroot -p

降低设置密码安全级别

如果想设置简单密码，需要降低Mysql的密码安全级别。

set global validate_password_policy=LOW;
​
set global validate_password_Length=4;

设置密码

ALTER USER 'root'@'localhost' IDENTIFIED BY 'password';
​
grant all privileges on *,* to root@"%" identified by 'password' with grant option;
​
flush privileges;

常见BUG

错误码1045

关闭防火墙，并执行下面命令

grant all privileges on *,* to root@"%" identified by 'password' with grant option;
​
flush privileges;

IDEA：JDBC driver may have disabled TLS 1.1 and its earlier versions.

URL添加 enabledTLSProtocols=TLSv1.2

jdbc:mysql://localhost:3306?enabledTLSProtocols=TLSv1.2