selinux

Selinux是Redhat/CentOS系统特有的安全机制。所以装完系统，我们一般都要把selinux关闭，以免引起不必要的麻烦。关闭selinux的方法为，使 “SELINUX=disabled”, 默认为 enforcing

[root@localhost ~]# vim /etc/selinux/config

# 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=disabled
# SELINUXTYPE= can take one of these two values:
#     targeted - Targeted processes are protected,
#     mls - Multi Level Security protection.
SELINUXTYPE=targeted

保存该配置文件后，重启机器方可生效，临时关闭selinux的命令为:

[root@localhost ~]# setenforce 0

我们可以使用 getenforce 命令获得当前selinux的状态:

[root@localhost ~]# getenforce
Disabled

阿铭的selinux早就关闭了，默认会输出 “enforcing” , 当使用 setenforce 0 这个命令后，再 getenforce 会输出 “permissive”