1、mysql官网下载安装包，版本号以实际下载为准
https://dev.mysql.com/downloads/mysql/
如：
mysql-server_8.0.40-1ubuntu24.04_amd64.deb-bundle.tar
2、上传到服务器
如 /opt/目录
3、创建一个mysql目录解压
mkdir mysql & tar -xvf mysql-server_8.0.40-1ubuntu24.04_amd64.deb-bundle.tar -C mysql
4、安装
cd mysql
sudo dpkg -i mysql-{common,community-client,community-client-core,community-client-plugins,client,community-server,community-server-core,server}_*.deb
5、启动(默认无密码)

sudo systemctl start mysqlsudo mysql -u root -pALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password by '12345678';update mysql.user set host = '%' where user ='root';flush privileges;

6、开机自启动并重启mysql
sudo systemctl enable mysqlsudo systemctl restart mysql