Describes the cause and action for error messages.
Error Message(English)：
user data not running
User data not running shell script on initial launch. : aws - Reddit
https://www.reddit.com/r/aws/comments/9v9euh/user_data_not_running_shell_script_on_initial/
cloud-init User Data Include File Format - Jason Butz
https://jasonbutz.info/2017/08/cloud-init-user-data-include-file-format/