I didn't understand that you're talking about cron file and yes you're right, there is a bug here. I fix it asap.
Shebang is #!/usr/bin/env bash, so I suspect an misconfiguration on your system. I know that is not the recommanded way but it's working.
Sorry, I made a mistake with el6. Please try netdata-1.13.0-2.el6 (not pushed to testing for now)
Instead of making bad comments without knowing anything, you should better explain what was the problem , it's more helpful.
Works as expected
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