To see the Manual page which provides a description of up2date’s usage:

man up2date

To configure up2date or view it’s current configuration:

up2date —configure

To list the channels up2date is currently subscribed to:

up2date —show-channels

To list all of the RPM packages available for the server via up2date:

up2date —show-all

To force an update of all packages on the server:

up2date -fu

You can also specify particular packages to force an update on as shown below:

up2date -fu <packagename>

ex.  up2date -fu kernel-smp