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