According to that doc, kadmin is an implementation-specific tool that isn't defined in the spec. Do you have a version of kadmin that works on your Linux servers?
In general, I'd recommend you ask this question somewhere else. I don't know anything about this topic and I'm not sure if anyone else on this forum does either. I also suggest providing a lot more details on what you are trying to accomplish if you want to avoid wasting time by having people ask you follow up questions. :)