When SELinux is running in enforcing mode, it enforces the SELinux policy and denies access based on SELinux policy rules. In Fedora, enforcing mode is enabled by default when the system was initially installed with SELinux.
First check the current SELinux mode by running the [command]`getenforce` command. If it displays `Disabled`, then follow <<{context}-enabling-selinux>>. Otherwise, if it displays `Permissive`, follow the procedure below to change mode to enforcing again:
On the next boot, SELinux relabels all the files and directories within the system and adds SELinux context for files and directories that were created when SELinux was disabled.
[NOTE]
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After changing to enforcing mode, SELinux may deny some actions because of incorrect or missing SELinux policy rules. To view what actions SELinux denies, enter the following command as root:
Alternatively, with the [package]*setroubleshoot-server* package installed, enter the following command as root:
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~]# grep "SELinux is preventing" /var/log/messages
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If SELinux denies some actions, see the link:https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/selinux_users_and_administrators_guide/chap-security-enhanced_linux-troubleshooting[Troubleshooting] chapter in the link:https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/selinux_users_and_administrators_guide/index[Red Hat Enterprise Linux 7 SELinux User's and Administrator's Guide] for information about troubleshooting.