This tutorial provides instructions for installing the Fira Code font in various versions of Ubuntu. This is my favorite font due to its various ligatures.

Ubuntu 16.04

sudo apt-install git
cd /tmp
git clone https://github.com/tonsky/FiraCode.git
sudo mv -i /tmp/FiraCode/distr/ttf /usr/share/fonts/truetype/fira-code
sudo fc-cache -fv

Ubuntu 17.04, 18.04, 20.04 and later

sudo apt update && \
sudo apt install fonts-firacode

More?

Installation for other systems: https://github.com/tonsky/FiraCode/wiki/Linux-instructions