uname -a
# 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
downloads.mysql.com/archives/community/
> 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
mysqladmin --version
> 默认的dataDir是对不上的。。需要修改下
vim /etc/my.cnf
datadir=/var/lib/mysql/mysql
systemctl start mysqld
systemctl status mysqld
cat /var/log/mysqld.log | grep password
mysql -u root -p
alter user root@localhost identified by 'Root_123456';
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;
