Debian/Ubuntu/Mint

PPA (Stable Version)

https://launchpad.net/~lucioc/+archive/ubuntu/sayonara

sudo apt-add-repository ppa:lucioc/sayonara
sudo apt-get update
sudo apt-get install sayonara

PPA (Beta Version)

https://launchpad.net/~lucioc/+archive/ubuntu/sayonara-experimental

sudo apt-add-repository ppa:lucioc/sayonara-experimental
sudo apt-get update
sudo apt-get install sayonara

DEB Packages

You can find Sayonara in the official repositories for Ubuntu versions greater than 21.04 and Debian sid.

sudo apt update
sudo apt install sayonara

You can also browse for debian package files here.