Security-Enhanced Linux (SELinux) is a Linux feature that provides a mechanism for supporting access control security policies, including United States Department of Defense style mandatory access controls, through the use of Linux Security Modules (LSM) in the Linux kernel.
Temporarily switch off enforcement
You can switch the system into permissive mode with the following command
echo 0 >/selinux/enforce
To switch back into enforcing mode
echo 1 >/selinux/enforce
To check what mode the system is in
sestatus
Fully Disabling SELinux
To fully disable SELinux you need to modify /etc/selinux/config file. Run following commands to fully disable SELinux
sed -i 's/^SELINUX=/#SELINUX=/g' /etc/selinux/config echo 'SELINUX=disabled' >> /etc/selinux/config
You need to restart the machine to reflect the changes.
Above methods should work on CentOS, RedHat and on Fedora.
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My name is Vidyadhar Sarmalkar & I work as a consultant and have done RHCE & CCNA. 
