1 ssh -v git@github.com 通过这个命令打印调试信息
ebug1: expecting SSH2_MSG_NEWKEYS
debug1: SSH2_MSG_NEWKEYS received
debug1: rekey after 134217728 blocks
debug1: SSH2_MSG_EXT_INFO received
debug1: kex_input_ext_info: server-sig-algs=<ssh-ed25519,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,ssh-rsa,rsa-sha2-512,rsa-sha2-256,ssh-dss>
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug1: Authentications that can continue: publickey
debug1: Next authentication method: publickey
debug1: Offering RSA public key: /Users/zhangjin/.ssh/id_rsa
debug1: Authentications that can continue: publickey
debug1: Trying private key: /Users/zhangjin/.ssh/id_dsa
debug1: Trying private key: /Users/zhangjin/.ssh/id_ecdsa
debug1: Trying private key: /Users/zhangjin/.ssh/id_ed25519
debug1: No more authentication methods to try.
是尝试用id_rsa的公钥来连接，但是自己上传的是id_rsa.github的东西，所以有问题
上传id_rsa.pub文件到GitHub的ssh keys列表后解决问题