How to download and setup ruby-progressbar
Open terminal and run command
                                            git clone https://github.com/jfelchner/ruby-progressbar.git
                                        
                                        git clone is used to create a copy or clone of ruby-progressbar repositories.
                                        You pass git clone a repository URL. it supports a few different network protocols and corresponding URL formats.
Also you may download zip file with ruby-progressbar https://github.com/jfelchner/ruby-progressbar/archive/master.zip
Or simply clone ruby-progressbar with SSH
                                            [email protected]:jfelchner/ruby-progressbar.git                                    
                                    If you have some problems with ruby-progressbar
You may open issue on ruby-progressbar support forum (system) here: https://github.com/jfelchner/ruby-progressbar/issuesSimilar to ruby-progressbar repositories
Here you may see ruby-progressbar alternatives and analogs
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