Mattermost is a free and open-source platform for developer collaboration and messaging. It's secure, flexible, and comes with a wide variety of tools to develop better workflows. Some notable features are two-factor authorization, video calls, file sharing capabilities, webhooks support, multi-threaded messaging, fully responsive user interfaces, and so on. Mattermost is an alternative to Slack. This article explains how to install Mattermost on Ubuntu 20.04. * Deploy a [fully updated](https://......