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Description of problem: The section '2.3. Running SystemTap Scripts' of the Beginner's guide contains an overview of systemtap permission groups 'stapdev' and 'stapusr'. The page claims that being in 'stapdev' group suffices to run systemtap scripts. This was true for RHEL6.0, but this was changed in the meantime due to security issues. I think the user now has to be in *both* 'stapdev' and 'stapusr' groups to be able to run staprun (and therefore, stap) on arbitrary systemtap script/module. But it would be best to work on this section with systemtap devs.