github配置问题，Socket operation on non-socket

Question

执行 $ ssh [e-mail]
结果是这样的。。。
socket: Socket operation on non-socket
ssh: connect to host github.com port 22: Socket operation on non-socket

$ ssh -v 192.168.27.142

结果是这样的
OpenSSH_7.1p1, OpenSSL 1.0.2d 9 Jul 2015
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: Connecting to 192.168.27.142 [192.168.27.142] port 22.
socket: Socket operation on non-socket
ssh: connect to host 192.168.27.142 port 22: Socket operation on non-socket

求问到底为什么，这块不太懂啊

Answer 1

同求，搞半天总是解决不了