As others have said, edit /etc/selinux/config as root & set to permissive as opposed to enforcing & then reboot for the changes to take effect.
Unless you are switching between permissive/enforcing and disabled (or vice-versa) you done need a reboot - just use setenforce to change the running behaviour...
Also as usual in the redhat world look to /ets/sysconfig/selinux ... although in this case that's just a symlink to /etc/selinux/config I have been tripped up on more than one occasion with only editing stuff in /etc and then wondering why behaviour is not as expected... and as such find it good practice to get in the habit of checking /etc/sysconfig before doing straight to the other /etc/<service> files....