问题一
FATAL: Unable to connect to relay host, errno=10061 kex_exchange_identification:
Connection closed by remote host Connection closed by UNKNOWN port 65535 fatal:
Could not read from remote repository.
使用ssh -v git@github.com命令查看具体的错误在哪里，然后就就可以排查问题了
通过配置发现有两处错误：
1、github我使用了代理，但是代理port不对，改下
2、github.com上面配置的ssh key被我删了，把id_rsa_github.pub拷贝到github上即可
