实验室有两台机子A和B
其中从A ssh登陆到机子B上面是没问题的..
但从B到A却不行
出错提示为:IT IS NOT .POSSIBLE THAT SOMEONE IS DOING .SOMETHING NASTY .
someone could be .ea.vesdroppin.g on your right now (man-in-the-middle attack !).
it is also possible that the .RSA host key has be.en changed教育