服务器被黑了，数据库被删了，留下了信息让支付比特币，应该怎么避免下次被黑呢？

[zhongjidalao]

All your data is a backed up. You must pay 0.015 BTC to 1Dy28zwYdyPYzWjGzuRLJeGeiEabG61AFZ 48 hours for recover it. After 48 hours expiration we will leaked and exposed all your data. Also do not forget about GDPR. You can buy bitcoin here, does not take much time to buy https://localbitcoins.com with this guide https://localbitcoins.com/guides/how-to-buy-bitcoins After paying write to me in the mail with your DB IP: [e-mail] 这是黑客留下的信息，还好有备份，很快就恢复了

[594duck]

安全是一个非常庞大的犹如洋葱一样的课题。

如果你是个人开发者，那只能说做好足够的备份和遵守最基本的权限最小化安全意识，不要暴露 SSH 端口。

如果你是企业，建议直接找专业的运维。

别指望程序员用 Docker 来忽悠 安全问题