How to disable SELinux on a cloud server?

To disable SELinux on a cloud server, follow these steps:

1. Check the current SELinux status:
   Run the command:

   sestatus
   

   This will show whether SELinux is enforcing, permissive, or disabled.

2. Temporarily set SELinux to permissive mode (optional):
   If you want to test without fully disabling it, run:

   sudo setenforce 0
   

   This changes SELinux to permissive mode (warnings are logged but policies are not enforced).

3. Permanently disable SELinux:
   Edit the SELinux configuration file:

   sudo vi /etc/selinux/config
   

   Find the line:

   SELINUX=enforcing
   

   Change it to:

   SELINUX=disabled
   

   Save and exit the file.

4. Reboot the server:
   SELinux changes require a reboot to take effect:

   sudo reboot
   

After rebooting, verify the status again with sestatus to confirm SELinux is disabled.

Note for cloud servers: If you're using a Tencent Cloud CVM (Cloud Virtual Machine), ensure that disabling SELinux does not conflict with any security policies required by your applications or Tencent Cloud services. For enhanced security, consider using Tencent Cloud's Security Group and Cloud Firewall instead of relying solely on SELinux.

Example:
If you're running a web server (e.g., Nginx) and SELinux is blocking port access, disabling it may resolve the issue. However, a better approach is to adjust SELinux policies (setsebool or semanage) rather than fully disabling it. If you still prefer to disable it, follow the steps above.

For Tencent Cloud users, if you encounter permission issues after disabling SELinux, check Tencent Cloud Security Center for recommendations on alternative security configurations.