解决git clone时出现Permission denied (publickey)问题

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问题：

$ git clone [email protected]:Git-Charles/ProjectDemo.git
Cloning into 'ProjectDemo'...
The authenticity of host 'github.com (13.250.177.223)' can't be established.
RSA key fingerprint is SHA256:nThbg6kXUpJWGl7E1IGOCspRomTxdCARLviKw6E5SY8.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added 'github.com,13.250.177.223' (RSA) to the list of known hosts.
[email protected]: Permission denied (publickey).
fatal: Could not read from remote repository.

Please make sure you have the correct access rights
and the repository exists.

解决步骤：

1. 启动Git Bash 右键 -> Git Bash Here）

2. 检查是否生成ssh key

   $ cd ~/.ssh	
   $ ls
   github-rsa  github-rsa.pub  known_hosts
   

   如果不存在，请替换邮箱后执行下面命令，一路回车即可生成ssh key。

   ssh-keygen -t rsa -C "[email protected]"
   

3. 执行ssh -v [email protected] 命令

   $ ssh -v [email protected]
   OpenSSH_7.7p1, OpenSSL 1.0.2p  14 Aug 2018
   debug1: Reading configuration data /etc/ssh/ssh_config
   debug1: Connecting to github.com [13.250.177.223] port 22.
   debug1: Connection established.
   debug1: key_load_public: No such file or directory
   debug1: identity file /c/Users/admin/.ssh/id_rsa type -1
   debug1: key_load_public: No such file or directory
   debug1: identity file /c/Users/admin/.ssh/id_rsa-cert type -1
   debug1: key_load_public: No such file or directory
   debug1: identity file /c/Users/admin/.ssh/id_dsa type -1
   debug1: key_load_public: No such file or directory
   debug1: identity file /c/Users/admin/.ssh/id_dsa-cert type -1
   debug1: key_load_public: No such file or directory
   debug1: identity file /c/Users/admin/.ssh/id_ecdsa type -1
   debug1: key_load_public: No such file or directory
   debug1: identity file /c/Users/admin/.ssh/id_ecdsa-cert type -1
   debug1: key_load_public: No such file or directory
   debug1: identity file /c/Users/admin/.ssh/id_ed25519 type -1
   debug1: key_load_public: No such file or directory
   debug1: identity file /c/Users/admin/.ssh/id_ed25519-cert type -1
   debug1: key_load_public: No such file or directory
   debug1: identity file /c/Users/admin/.ssh/id_xmss type -1
   debug1: key_load_public: No such file or directory
   debug1: identity file /c/Users/admin/.ssh/id_xmss-cert type -1
   debug1: Local version string SSH-2.0-OpenSSH_7.7
   debug1: Remote protocol version 2.0, remote software version babeld-80573d3e
   debug1: no match: babeld-80573d3e
   debug1: Authenticating to github.com:22 as 'git'
   debug1: SSH2_MSG_KEXINIT sent
   debug1: SSH2_MSG_KEXINIT received
   debug1: kex: algorithm: curve25519-sha256
   debug1: kex: host key algorithm: rsa-sha2-512
   debug1: kex: server->client cipher: [email protected] MAC: <implicit> compression: none
   debug1: kex: client->server cipher: [email protected] MAC: <implicit> compression: none
   debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
   debug1: Server host key: ssh-rsa SHA256:nThbg6kXUpJWGl7E1IGOCspRomTxdCARLviKw6E5SY8
   debug1: Host 'github.com' is known and matches the RSA host key.
   debug1: Found key in /c/Users/admin/.ssh/known_hosts:1
   debug1: rekey after 134217728 blocks
   debug1: SSH2_MSG_NEWKEYS sent
   debug1: 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: Trying private key: /c/Users/admin/.ssh/id_rsa
   debug1: Trying private key: /c/Users/admin/.ssh/id_dsa
   debug1: Trying private key: /c/Users/admin/.ssh/id_ecdsa
   debug1: Trying private key: /c/Users/admin/.ssh/id_ed25519
   debug1: Trying private key: /c/Users/admin/.ssh/id_xmss
   debug1: No more authentication methods to try.
   [email protected]: Permission denied (publickey).
   

4. 执行ssh-agent -s

   $ ssh-agent -s
   SSH_AUTH_SOCK=/tmp/ssh-6nEUqcwhC07l/agent.7712; export SSH_AUTH_SOCK;
   SSH_AGENT_PID=1000; export SSH_AGENT_PID;
   echo Agent pid 1000;
   

5. 执行$ssh-add ~/.ssh/github-rsa

   $ ssh-add ~/.ssh/github-rsa
   Identity added: /c/Users/admin/.ssh/github-rsa (/c/Users/admin/.ssh/github-rsa)
   

   如果出现Could not open a connection to your authentication agent

   $ ssh-add ~/.ssh/github-rsa
   Could not open a connection to your authentication agent.
   

   先执行下面命令后在执行上述命令

   $ eval `ssh-agent -s`
   Agent pid 8312
   

6. 验证SSH Key

   执行ssh -T [email protected]

   $ ssh -T [email protected]
   Hi Git-Charles! You've successfully authenticated, but GitHub does not provide shell access.
   

7. 克隆代码

   $ git clone [email protected]:Git-Charles/ProjectDemo.git
   Cloning into 'ProjectDemo'...
   remote: Enumerating objects: 153, done.
   remote: Counting objects: 100% (153/153), done.
   remote: Compressing objects: 100% (100/100), done.
   remote: Total 153 (delta 37), reused 143 (delta 27), pack-reused 0
   Receiving objects: 100% (153/153), 105.38 KiB | 15.00 KiB/s, done.
   Resolving deltas: 100% (37/37), done.