Vitux published a tutorial about speeding up package downloads and updates with apt-fast on Ubuntu 20.04.

How to Speed Up Package Downloads and Updates with apt-fast on Ubuntu 20.04

Have you ever experienced slow download speed when downloading or updating packages in Ubuntu, even if your network connection is working fine? This problem mainly occurs when you update and install packages for the first time after installing a new Ubuntu operating system. However, there is a way to work around this problem by speeding up the download speed with the apt-fast command in Linux.

How to Speed Up Package Downloads and Updates with apt-fast on Ubuntu 20.04