我刚开始学习Ansible的基础知识，并查找了为什么我得到上述错误，但无法弄清楚如何整理出来。 这是一个痕迹：
Me-Air:ansible me$ ansible all -m ping -vvv Using /private/etc/ansible/ansible.cfg as config file <Public_IP> ESTABLISH SSH CONNECTION FOR USER: [my_user_name_on_EC2_instance] <Public_IP> SSH: EXEC ssh -C -q -o ControlMaster=auto -o ControlPersist=60s -o KbdInteractiveAuthentication=no -o PreferredAuthentications=gssapi-with-mic,gssapi-keyex,hostbased,publickey -o PasswordAuthentication=no -o ConnectTimeout=10 -o ControlPath=/Users/me/.ansible/cp/ansible-ssh-%h-%p-%r -tt [Public_IP] '/bin/sh -c '"'"'( umask 22 && mkdir -p "` echo $HOME/.ansible/tmp/ansible-tmp-... `" && echo "` echo $HOME/.ansible/tmp/ansible-tmp-... `" )'"'"'' Public_IP | UNREACHABLE! => { "changed": false, "msg": "SSH encountered an unknown error during the connection. We recommend you re-run the command using -vvvv, which will enable SSH debugging output to help diagnose the issue", "unreachable": true } ------ 我曾问过：
The authenticity of host 'public IP' can't be established. RSA key fingerprint is ...[key]. Are you sure you want to continue connecting (yes/no)? yes
这是我在主机文件中的：
[name_of_the_EC2_instance] Public_IP
并在configuration文件中：
[defaults] host_key_checking = False
我错过了那里的东西。 有任何想法吗？
提前致谢。
正如在评论中所探讨的那样，没有指定私钥文件。 默认文件（ .ssh/id_dsa ， .ssh/id_dsa ）被尝试，但未find。
私钥文件可以通过几种方式添加：
（1）使用ssh代理： ssh-add ~/.ssh/my-key.pem
（2）默认为ansible.cfg ：
[defaults] private_key_file=~/.ssh/my-key.pem
（3）每个主机在库存中指定：
my-host-ip ansible_ssh_private_key_file=~/.ssh/my-key.pem