Thank you very much for your explanation and guidance, Jay! Unfortunately, sandbox.service is not listed in HDF (just sandbox-ambari-services.service and sandbox-splash-web-server.service) nor does the /root/start_scripts/start_sandbox.sh file exist as mentioned in the article. Any suggestions on where to find documentation for HDF 3.1 (Linux sandbox-hdf.hortonworks.com 4.17.2-1.el7.elrepo.x86_64 #1 SMP Sat Jun 16 11:18:11 EDT 2018 x86_64 x86_64 x86_64 GNU/Linux)?
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