I. Found the problem:

Permission denied (public key) when using the git clone command.

II. Solve the problem:

1. First, try to re-add the previously generated key, and add it several times, but it still does not work.

2. Use the command ssh -v [email protected]测试, the last few lines result in the following.

debug1: Authentications that can continue: publickey
debug1: Next authentication method: publickey
debug1: Trying private key: /home/gr/.ssh/id_rsa
debug1: Trying private key: /home/gr/.ssh/id_dsa
debug1: Trying private key: /home/gr/.ssh/id_ecdsa
debug1: No more authentication methods to try.
Permission denied (publickey).

3. Analysis: Tried 3 private keys, but none of them worked, and finally it led to Permission denied.

4, check my key, ls ~/.ssh/ :

bajie bajie.pub known_hosts

5. I found that my id_rsa file I commanded as bajie, so it is not used at all. Also you can check the key list with the following command.

ssh-add -l

6. The key list of the above command is empty, so to add my key, use the command

gr@grpc:~/workspace/git/home$ ssh-add ~/.ssh/bajie

Enter passphrase for /home/gr/.ssh/bajie:
Identity added: /home/gr/.ssh/bajie (/home/gr/.ssh/bajie)

7. Check again, as follows, the addition was successful.

gr@grpc:~/workspace/git/home$ ssh-add -l

2048 63:c5:d8:6c:a0:0c:a8:9c:26:d8:f8:95:de:29:04:eb /home/gr/.ssh/bajie (RSA)

8. Use ssh -v [email protected]测试连接 again and you can see that the authentication is passed.

debug1: Authentications that can continue: publickey
debug1: Next authentication method: publickey
debug1: Offering RSA public key: /home/gr/.ssh/bajie
debug1: Server accepts key: pkalg ssh-rsa blen 279
debug1: Authentication succeeded (publickey).
Authenticated to github.com ([192.30.252.129]:22).

9. Finally, git clone project succeeded.