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