默认的Debian存储库中没有提供MySQL，这是世界上最流行的开源关系数据库管理系统。MariaDB是Debian 10中的默认数据库系统。
本教程说明了如何从MySQL Apt Repository在Debian 10上安装和保护MySQL 。
配置MySQL存储库
要将MySQL APT存储库添加到您的系统，请转到存储库下载页面，并使用以下wget命令下载最新的发行包：
wget http://repo.mysql.com/mysql-apt-config_0.8.13-1_all.deb下载完成后，以具有sudo特权的用户身份安装发行包：
sudo apt install ./mysql-apt-config_0.8.13-1_all.deb系统将显示配置菜单，从中可以选择要安装的MySQL版本。
预先选择了MySQL 8.0，如果要安装MySQL 5.7，请选择MySQL Server & Cluster (Currently selected: mysql-8.0)并选择您喜欢的MySQL版本
我们将安装MySQL 8.0版。OK通过按下Tab并点击进行选择Enter（如上图所示）。
如果不确定要选择哪个版本，请查阅要在服务器上部署的应用程序的文档。
安装MySQL
使用以下命令更新软件包列表并安装MySQL服务器软件包：
sudo apt update
sudo apt install mysql-server安装程序将要求您设置MySQL根密码。现在不要设置密码（将其保留为空白），我们将在下一部分中进行设置。
接下来，将向您显示一条消息，通知您有关新的MySQL 8身份验证的信息。在选择默认的MySQL 8身份验证插件之前，请确保您的应用程序支持它。
安装完成后，MySQL服务将自动启动，您可以通过键入以下内容进行验证：
sudo systemctl status mysql● mysql.service - MySQL Community Server
Loaded: loaded (/lib/systemd/system/mysql.service; enabled; vendor preset: en
Active: active (running) since Fri 2019-07-26 13:23:25 PDT; 37s ago
...
保护MySQL
运行mysql_secure_installation命令以设置root密码并提高MySQL安装的安全性：
sudo mysql_secure_installationSecuring the MySQL server deployment.
Connecting to MySQL using a blank password.
VALIDATE PASSWORD COMPONENT can be used to test passwords
and improve security. It checks the strength of password
and allows the users to set only those passwords which are
secure enough. Would you like to setup VALIDATE PASSWORD component?
Press y|Y for Yes, any other key for No:
系统将要求您配置VALIDATE PASSWORD PLUGIN用来测试MySQL用户密码强度的密码。密码验证策略分为三个级别：低，中和强。出版社ENTER如果你不想来设置验证密码插件。
Please set the password for root here.
New password:
Re-enter new password:
在下一个提示符下，将要求您设置MySQL root用户的密码。
By default, a MySQL installation has an anonymous user,
allowing anyone to log into MySQL without having to have
a user account created for them. This is intended only for
testing, and to make the installation go a bit smoother.
You should remove them before moving into a production
environment.
Remove anonymous users? (Press y|Y for Yes, any other key for No) : y
Success.
Normally, root should only be allowed to connect from
'localhost'. This ensures that someone cannot guess at
the root password from the network.
Disallow root login remotely? (Press y|Y for Yes, any other key for No) : y
Success.
By default, MySQL comes with a database named 'test' that
anyone can access. This is also intended only for testing,
and should be removed before moving into a production
environment.
Remove test database and access to it? (Press y|Y for Yes, any other key for No) : y
- Dropping test database...
Success.
- Removing privileges on test database...
Success.
Reloading the privilege tables will ensure that all changes
made so far will take effect immediately.
Reload privilege tables now? (Press y|Y for Yes, any other key for No) : y
Success.
All done!
一旦设置了root密码，脚本还将要求您删除匿名用户，限制root用户对本地计算机的访问并删除测试数据库。您应该对所有问题回答“是”（是）。
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