Unixcop published a tutorial about installing TimescaleDB on Ubuntu 20.04.

How To Install TimescaleDB on Ubuntu 20.04

TimescaleDB is an open-source time series database developed by Timescale Inc. It written in C (programming language) and extends PostgreSQL.  Timescale is the open-source relational database for time-series and analytics.

How To Install TimescaleDB on Ubuntu 20.04 - Unix / Linux the admins Tutorials