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How to Check SELinux Status
Security-Enhanced Linux (SELinux) is a security architecture for Linux systems that enforces access control policies. Knowing the status of SELinux is crucial for system administrators to ensure that the correct policies are in place. This tutorial will guide you through the process of checking the SELinux status on your system.
1. Using the getenforce Command
The simplest way to check the current mode of SELinux is by using the getenforce command:
getenforceThis command will return one of the following values:
- Enforcing: SELinux is actively enforcing security policies.
- Permissive: SELinux is not enforcing policies but is logging actions that would have been denied.
- Disabled: SELinux is completely turned off.
2. Checking Detailed Status with sestatus
To get detailed information regarding SELinux, use the sestatus command:
sestatusThis command provides detailed information about the SELinux mode, policy name, and other relevant settings.
2.1. Understanding sestatus Output
The output of sestatus will look like this:
SELinux status: enabled
SELinuxfs mount: /sys/fs/selinux
SELinux mode: enforcingThis confirms whether SELinux is enabled or disabled and its current operating mode.
3. Checking SELinux Logs
For a deeper insight into SELinux operations and potential denials, you can examine the logs typically stored in:
/var/log/audit/audit.logTo view the logs, you can use:
sudo cat /var/log/audit/audit.log | grep deniedThis displays any actions that have been denied by SELinux policies.
4. Conclusion
By following this tutorial, you have learned how to check the status of SELinux on your Linux system. Regularly monitoring SELinux ensures that your security policies are functioning correctly. Continue to explore SELinux configurations and best practices to maintain a secure Linux environment!
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