see
Turning Off SELinux
Temporarily turn off SELinux
echo 0 > /selinux/enforce
The file itself will be empty, but you'll see something in /var/log/messages
dbus: avc: received setenforce notice (enforcing=0)
Of course you can also turn it back on with "1" instead of "0".
This temporary change will not persist through a system reboot. You need to modify /etc/selinux/config to make permanent changes.
Annoyingly, if you check to see if selinux is enabled, it reports "enabled" even when it's temporarily disabled!?
selinuxenabled && echo enabled || echo disabled