一、准备
查看Linux版本信息
uname -a
卸载Linux7自带的mariadb
# 查看相关包
rpm -qa | grep mariadb
# 卸载相关包
rpm -e 查出来的包名，有依赖的一起删掉就行
下载相关包
downloads.mysql.com/archives/community/
二、安装
写文章用的安装包
上传
> 将下载的包上传到服务器上
RPM安装
> 顺序已经列出来了，不要错了
rpm -ivh mysql-community-common-8.0.23-1.el7.x86_64.rpm
rpm -ivh mysql-community-client-plugins-8.0.23-1.el7.x86_64.rpm
rpm -ivh mysql-community-libs-8.0.23-1.el7.x86_64.rpm
rpm -ivh mysql-community-client-8.0.23-1.el7.x86_64.rpm
rpm -ivh mysql-community-server-8.0.23-1.el7.x86_64.rpm
检查
mysqladmin --version
三、启动
配置
> 默认的dataDir是对不上的。。需要修改下
vim /etc/my.cnf
datadir=/var/lib/mysql/mysql
启动
systemctl start mysqld
systemctl status mysqld
四、修改密码
查看默认密码
cat /var/log/mysqld.log | grep password
登录
mysql -u root -p
临时修改符合规则的密码
alter user root@localhost identified by 'Root_123456';
更改密码策略
SHOW VARIABLES LIKE 'validate_password%';
set global validate_password.policy = low;
set global validate_password.length = 4;
alter user root@localhost identified by '123456';
update user set host='%' where host='localhost';
systemctl restart mysqld;