Unixcop published a tutorial about installing and using UNRAR on Ubuntu 20.04 or 22.04 LTS.

How to Install and Use UNRAR on Ubuntu 20.04 | 22.04 LTS

In this guide, we will show you how to install and use UNRAR on Ubuntu systems. UnRAR is the name of two different command-line applications for extracting RAR file archives. RAR is a proprietary archive file format that supports data compression, error correction and file spanning. It was developed in 1993 by Russian software engineer Eugene Roshal and the software is licensed by win.rar GmbH. 

How to Install and Use UNRAR on Ubuntu 20.04 | 22.04 LTS - Unix / Linux the admins Tutorials