How to download and setup lxd
Open terminal and run command
                                            git clone https://github.com/canonical/lxd.git
                                        
                                        git clone is used to create a copy or clone of lxd 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 lxd https://github.com/canonical/lxd/archive/master.zip
Or simply clone lxd with SSH
                                            [email protected]:canonical/lxd.git