Ubuntu 20.04 comes with MySQL 8.0 as the default package. But, sometimes, you need MySQL 5.7 for your legacy apps that don't support MySQL 8.0 yet. This tutorial explains how to add MySQL 5.7 package and install it on Ubuntu 20.04. Before you begin, you should : * Deploy [a fully updated](https://docs.vultr.com/how-to-update-a-vultr-cloud-server#how-to-update-debian--ubuntu) Ubuntu 20.04 server. * Create a non-root user with sudo privileges. Because Ubuntu 20.04 only has MySQL 8.0 in the APT rep......