SELinux, short for Security-Enhanced Linux, is a security enhancement feature for the Linux operating system. By default, SELinux blocks many system operations, leading to administrative difficulties, and the cost-benefit ratio of learning and understanding SELinux is not high. Therefore, it is often disabled and replaced with other security measures. Here, we demonstrate how to disable SELinux using a cloud server running CentOS 7 as an example.

First, we check the status of SELinux.

sestatus

If the command line returns: SELinux status: enabled, this indicates that SELinux is active. It can be disabled with the following command:

setenforce 0

This command only temporarily disables SELinux; upon system reboot, the settings will revert to their original state. Therefore, we need to directly modify the SELinux configuration file.

vi /etc/sysconfig/selinux

Set the following line to disabled:

SELINUX=disabled

After rebooting, check the SELinux status again to confirm whether it has been disabled.

sestatus

This concludes the method for disabling SELinux.