How to configure SELinux Policies

如果用户由于SELinux配置不当（如误删策略或未配置合理的规则或安全上下文）导致系统无法启动，可以在启动参数中添加selinux=0，关闭SELinux功能，系统即可正常启动。

To configure the default SELinux mode, edit the configuration file for SELinux, /etc/selinux/config, and set the value of the SELINUX directive to enforcing, or permissive.

Disabling SELinux or setting it to permissive mode prevents SELinux from protecting the system. Changing SELinux status by using the setenforce command is temporary and reverts after restart.

In this chapter, you learn how to set up and manage SELinux on SUSE Linux Enterprise Server. The following topics are covered:

在CentOS系统中配置SELinux可以显著提高系统的安全性。 本文将详细介绍如何在CentOS上配置SELinux，从基本概念到高级配置，帮助您从入门到精通。

In this detailed guide, we’ll explore how to configure SELinux policies, learn about the key SELinux commands, and gain insights into troubleshooting and maintaining SELinux in your environment.

Learning how to configure SELinux on Linux server systems is essential for hardening production workloads in 2026. SELinux enforces mandatory access control to contain breaches, limit lateral movement, and reduce zero-day impact.