I actually did follow the guide you linked BUT I'll admit that I skipped the following steps:
- "Import the Elasticsearch PGP Keyedit"
- The first 2 steps under "Installing from the APT repository"
I did not specify a version, I just did "apt-get install elasticsearch".
As I said I'm a noob and I assumed apt-get would install the latest version. Perhaps what is missing was this:
echo "deb https://artifacts.elastic.co/packages/6.x/apt stable main" | sudo tee -a /etc/apt/sources.list.d/elastic-6.x.list
Would that tell apt-get the correct version? I had assumed apt-get was a centralized repo like npm.