cygwin 下配置ssh

Permissions 0660 for ‘/home/Xinzhe/.ssh/id_rsa‘ are too open.

It is required that your private key files are NOT accessible by others.

This private key will be ignored.

bad permissions: ignore key: /home/Xinzhe/.ssh/id_rsa

Permission denied (publickey)

原来是权限所导致的

修改权限：chmod 700 ~/.ssh/id_rsa
修改完了再尝试，丫还是一样，组权限好像改不了。上网搜索了一下，好像是cygwin的一个bug，在windows下面组默认是none，所以无法修改其权限。 

到.ssh文件夹下面，修改组为windows的Users组：chgrp Users *

再执行chmod命令，ls -l看一下，权限改过来了。再次连接，OK成功。