1. 檢視SELinux狀態

1.1 getenforce

• getenforce 命令是單詞get（獲取）和enforce(執行)連寫，可檢視selinux狀態，與setenforce命令相反。

• setenforce 命令則是單詞set（設定）和enforce(執行)連寫，用於設定selinux防火牆狀態，如： setenforce 0用於關閉selinux防火牆，但重啟後失效

  [[email protected] ~]# getenforce
  Enforcing

1.2 /usr/sbin/sestatus

Current mode表示當前selinux防火牆的安全策略

[[email protected]
 
 ~]# /usr/sbin/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
Max kernel policy version:      28

SELinux status：selinux防火牆的狀態，enabled表示啟用selinux防火牆
Current mode： selinux防火牆當前的安全策略，enforcing 表示強

2. 關閉SELinux

2.1 臨時關閉

setenforce 0 ：用於關閉selinux防火牆，但重啟後失效。

[[email protected] ~]# setenforce 0

[[email protected] ~]# /usr/sbin/sestatus
SELinux status
 
:                 enabled
SELinuxfs mount:                /sys/fs/selinux
SELinux root directory:         /etc/selinux
Loaded policy name:             targeted
Current mode:                   permissive
Mode from config file:          enforcing
Policy MLS status:              enabled
Policy deny_unknown status:     allowed
Max kernel policy version:      28

2.1 永久關閉

修改selinux的配置檔案，重啟後生效。

開啟 selinux 配置檔案

[[email protected] ~]# vim /etc/selinux/config

修改 selinux 配置檔案

將SELINUX=enforcing改為SELINUX=disabled，儲存後退出

# This 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 - No SELinux policy is loaded.
SELINUX=enforcing
# SELINUXTYPE= can take one of three two values:
#     targeted - Targeted processes are protected,
#     minimum - Modification of targeted policy. Only selected processes are protected. 
#     mls - Multi Level Security protection.
SELINUXTYPE=targeted

此時獲取當前selinux防火牆的安全策略仍為Enforcing，配置檔案並未生效。

[[email protected] ~]# getenforce
Enforcing

重啟

[[email protected] ~]# reboot

驗證

[[email protected] ~]# /usr/sbin/sestatus
SELinux status:                 disabled

[[email protected] ~]# getenforce
Disabled