During the life of your cluster, you may want to delete unused images, create new images, or change the image that a client uses. Currently OSCAR doesn't have a direct interface to do this, but you can use the SIS commands directly. Here are some useful examples:
mksimachine --List
mksiimage --List
mksiimage --Delete --name <imagename>
mksimachine --Update --name <machinename> --image <imagename>
There is also a SIS GUI that is availble. Start it by running tksis.
More details on these commands can be obtained from their respective
man pages.