How to download and setup ctftool
Open terminal and run command
                                            git clone https://github.com/taviso/ctftool.git
                                        
                                        git clone is used to create a copy or clone of ctftool 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 ctftool https://github.com/taviso/ctftool/archive/master.zip
Or simply clone ctftool with SSH
                                            [email protected]:taviso/ctftool.git                                    
                                    If you have some problems with ctftool
You may open issue on ctftool support forum (system) here: https://github.com/taviso/ctftool/issuesSimilar to ctftool repositories
Here you may see ctftool alternatives and analogs
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