一、CentOS5.X 6.X 永久关闭SELinux

vim /etc/sysconfig/selinux

# 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
SELINUX=disabled  ##修改此处为disables
# SELINUXTYPE= can take one of these two values:
#     targeted - Targeted processes are protected,
#     minimum - Modification of targeted policy. Only selected processes are protected. 
#     mls - Multi Level Security protection.
SELINUXTYPE=targeted

重启系统即可

二、临时关闭SELinux

setenforce 0

三、CentOS7 永久关闭SELinux

按CentOS5.x 6.x 操作后,重启系统无效。 原因是CentOS7 中CentOS7中文件/etc/sysconfig/selinux并不是/etc/selinux/config的软连接,修改源文件/etc/selinux/config重启后即可生效。

vim /etc/selinux/config
#SELINUX=enforcing 
#改为
SELINUX=disabled