Hi @KitYong ,
The 6.0 beta has long passed and we are now up to GA release 6.3. I am not sure if we have the bits for the beta.
If you are using CM/CDH, I'd recommend you consider upgrading to a release version.
See the upgrade paths here:
https://docs.cloudera.com/documentation/enterprise/upgrade/topics/ug_upgrade_paths.html
Since you are using a beta release, it is hard to anticipate if there would be any issues upgrading, but it is likely the upgrade will work fine (going from 6.0.0 beta to 6.3). As always, back up your CM/CDH SQL databases before upgrading to make sure you have a copy of the db info if something goes wrong.