issue:
os>ssh 196.168.27.90ssh: connect to host 196.168.27.90 port 22: Connection refused
solution:
ssh oracle@196.168.27.90是成功的吗？
refer
https://zhidao.baidu.com/question/544771023.html
port 22: Connection refused
原文：http://www.cnblogs.com/feiyun8616/p/7676233.html
