在一些 Linux 发行版中（包括 Oracle Linux、RHEL、CentOS 和 Fedora），SELinux 默认是启用的。使用 sestatus 命令来确定你的发行版是否启用了 SELinux：SELinux is enabled by default on some Linux distributions including Oracle Linux, RHEL, CentOS, and Fedora. Use the sestatus command to determine if SELinux is enabled on your distribution:

$> sestatus
SELinux status:                 enabled
SELinuxfs mount:                /sys/fs/selinux
SELinux root directory:         /etc/selinux
Loaded policy name:             targeted
Current mode:                   enforcing
Mode from config file:          enforcing
Policy MLS status:              enabled
Policy deny_unknown status:     allowed
Memory protection checking:     actual (secure)
Max kernel policy version:      31

如果 SELinux 被禁用或找不到 sestatus 命令，请在启用 SELinux 之前参阅你发行版的 SELinux 文档以获取指导。If SELinux is disabled or the sestatus command is not found, refer to your distribution's SELinux documentation for guidance before enabling SELinux.