Upgrade guides are available for:
Upgrade Scylla Enterprise from 2019.1.x to 2020.1.y on Red Hat Enterprise Linux and CentOS
Upgrade Scylla Enterprise from 2019.1.x to 2020.1.y on Ubuntu 16.04
Upgrade Scylla Enterprise from 2019.1.x to 2020.1.y on Ubuntu 18.04
Upgrade Scylla Enterprise from 2019.1.x to 2020.1.y on Debian
Scylla Enterprise Metrics Update - Scylla 2019.1 to 2020.1