Install arj by entering the following commands in the terminal:
sudo apt update sudo apt install arj
Description:
archiver for .arj files
This package is an open source version of the arj archiver. This version has been created with the intent to preserve maximum compatibility and retain the feature set of original ARJ archiver as provided by ARJ Software, Inc.
Homepage: https://sf.net/projects/arj/
Version: 3.10.22-17
Section: universe/utils