For a long time, the main purpose of a VPS in the hands of a good VPS is to install lnmp, look at the probe in your spare time, and get a sense of self-satisfaction O(∩_∩)O~ Therefore, I don’t pay too much attention to security issues. There are always so many people with pain on the Internet... After encountering something, it is necessary to reflect on it and take some necessary, simple, novice-level security measures suitable for VPS. Today, we will share the most basic security configuration of VPS.