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