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How to troubleshoot CloudFormation template
        Chris Churas edited this page Oct 19, 2018 
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    CloudFormation generates the following log file: /var/log/cloud-init-output.log
This file be examined to troubleshoot launch issues.
NOTE: A quick way to find start of output of UserData script is to look for first line with ::::
The actual script run appears to be this file: /var/lib/cloud/instance/scripts/part-001