Went through it all over again, right from the start and still got the ElasticSearch Issue.
magento@ubuntu-mage2-stylerep:/var/www/html$ bin/magento setup:upgrade
Cache cleared successfully
File system cleanup:
/var/www/html/generated/code/Composer
/var/www/html/generated/code/Dotdigitalgroup
/var/www/html/generated/code/Magento
/var/www/html/generated/code/PayPal
/var/www/html/generated/code/Symfony
/var/www/html/generated/code/Yotpo
The directory '/var/www/html/generated/metadata/' doesn't exist - skipping cleanup
/var/www/html/pub/static/deployed_version.txt
/var/www/html/var/view_preprocessed/pub
Updating modules:
Could not validate a connection to Elasticsearch. No alive nodes found in your cluster
magento@ubuntu-mage2-stylerep:/var/www/html$ curl elasticsearch:9200
curl: (6) Could not resolve host: elasticsearch
magento@ubuntu-mage2-stylerep:/var/www/html$ curl -X GET 'http://localhost:9200'
curl: (7) Failed to connect to localhost port 9200: Connection refused
Any thoughts? Has anyone successfully followed the tutorial?