/etc/sysconfig/yum-updateonboot
# IF any of these rpms are updated, the yum-updateonboot init script will
# reboot immediately after the yum update. To keep yum-updateonboot from
# rebooting the system, comment this line out.
#REBOOT_RPMS="kernel kernel-smp"
# A list of groups that should be updated at boot. For each group mentioned
# yum-updateonboot will call 'yum -y groupupdate' Since group names tend to
# have spaces in them, used a semi-colon to separate the group names
#GROUPLIST="My Group;MyOtherGroup;Some_Group;My Group 4"
# Be quiet when updating by default
# These options are passed to yum, default value is "-q"
#OPTIONS="-q"
\t\t
Like every service in Fedora, it is disabled by default, and it must be configured to start in the desired run levels.
$ chkconfig yum-updateonboot on
The above command will cause the service to start the next time you boot the system, ie the system will be updated.