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How to Install Docker on Ubuntu 18.04

In this article, you’ll install and use Docker Community Edition (CE) on Ubuntu 18.04. 

Prerequisites

  • Ubuntu 18.04 64-bit operating system.
  • A user account with sudo privileges

Installing Docker

The Docker installation package available in the official Ubuntu repository may not be the latest version. To ensure we get the latest version, we’ll install Docker from the official Docker repository. To do that, we’ll add a new package source, add the GPG key from Docker to ensure the downloads are valid, and then install the package.

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Package Signing in PIP

A few days ago, I made this DEV.to post about how Python's PIP lacks GPG package signing. Well, it turns out that I'm wrong! It does have a package signing process after all. Except it's one of the most manual, archaic, and cumbersome security practices I've seen to date.

I discovered this method when I landed on this blog post by a core python developer yesterday. To test package signing in the way described, I created a test package called siterank, a small script to fetch Alexa ranking of given websites.