SELinux is an acronym for Security-Enhanced Linux. It is a Linux kernel security feature for access control. For example, with the help of SELinux sysadmin can determine which Linux server users and apps can access which resources.
How to disable SELinux on a CentOS / RHEL / Fedora
The procedure to remove and disable SELinux security features is as follows:
- Log in to your server
- Check the current SELinux status, run: sestatus
- To disable SELinux on CentOS 7 temporarily, run: sudo setenforce 0
- Edit the /etc/selinux/config file and set the SELINUX to disabled
- Reboot the Linux server
- Verify it by running the sestatus and getenforce again
Let us see all examples and usage in details.
How to find out SELinux status
Run the following command:
Another option is to run the following command to print the current mode of SELinux
Another option is to runt the following cat command:
Different types of security policy
/etc/selinux/config file controls the state of SELinux on the system. SELINUX= can take one of these three values:
- enforcing – SELinux security policy is enforced.
- permissive – SELinux prints warnings instead of enforcing (disabled).
- disabled – No SELinux policy is loaded (disabled).
SELINUXTYPE= can take one of following:
- targeted – Targeted processes are protected.
- minimum – Modification of targeted policy. Only selected processes are protected.
- mls – Multi Level Security protection.
Warning: The author does not recommend disabling SELinux and is not responsible for security problems on your Linux-based server.
You can modify the mode SELinux is running in using the setenforce command. For example, to put SELinux in enforcing mode, run:
sudo setenforce Enforcing
To put SELinux in permissive mode i.e. disabled mode:
sudo setenforce Permissive
Please note that is temporary solution to disable SELinux without rebooting the server and active for the current session only. Hence, use the following method for disabling SELinux forever.
Disabling SELinux permanently
Edit the /etc/selinux/config file, run:
sudo vi /etc/selinux/config
Set SELINUX to disabled:
Save and close the file in vi/vim. Reboot the Linux system:
After reboot, make sure following commands gives Disabled output indicating that SELinux removed and disabled on your Linux server:
This page explained how to incapacitated SELinux running on your CentOS / RHEL 7 and Fedora Linux. For more information, see this page here.