This information was for Fedora 14 and needs to be updated
When using Fedora a free service to update running kernels is available through KSplice. There is no good reason not too download this and set it to auto-install.
Install the package using
yum install ksplice-uptrack.rpm --nogpgcheck -y.
After installing the package run "uptrack-upgrade -n" and accept the license
and let it retrieve an API key.
/etc/upstart/upstart.conf and change "autoinstall" to yes. It will
automatically check and install updates every half an hour. The specific times
it updates are not exact and adjusted by KSplice to balance the load on their