已经按照我自己总结的各种方法尝试过了，每一种方法都不行 
服务器是树莓派 尝试用于免密登录的设备有windows，macOS，linux，android(termux)均不可以 
出现了 

Number of key(s) added:        1

Now try logging into the machine, with:   "ssh 'zen@192.168.1.9'"
and check to make sure that only the key(s) you wanted were added.

之后再次登陆依然要求密码 
服务器上sshd_config没有更改过 是初始状态 
求大佬给个排查方向