CentOS7的Selinux被黑客关闭且无法重启

1. 通过 dmsg|grep -i selinux查看错误信息：

# dmesg | grep -i selinux

[    0.181979]SELinux:  Initializing.

[    0.181988]SELinux:  Starting in permissive mode

[    0.268539] EVM: security.selinux

[    0.797927]SELinux:  Registering netfilter hooks

[    0.867048] systemd[1]: systemd 219 running in system mode. (+PAM +AUDIT +SELINUX +IMA -APPARMOR +SMACK +SYSVINIT +UTMP +LIBCRYPTSETUP +GCRYPT +GNUTLS +ACL +XZ +LZ4 -SECCOMP +BLKID +ELFUTILS +KMOD +IDN)

[    2.611823]SELinux:  Disabled at runtime.

[    2.611845]SELinux:  Unregistering netfilter hooks

[    2.612069] type=1404 audit(1530573239.255:2):selinux=0 auid=4294967295 ses=4294967295

2. 运行命令： yum reinstall selinux-policy-targeted 重新安装selinux的策略。