windows - Error changing permissions id_rsa (ssh) -

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i trying make ssh connection between windows 8 , raspberry pi.

i generate public ssh key command ssh-keygen -t rsa -n '' , saved in folder /cygdrive/c/users/user/.ssh.

then, transfer file id_rsa.pub authorized_keys in raspberry. when try connect again, says:

permissions 0660 '/cygdrive/c/users/user/.ssh/id_rsa' open.

in order correct it, use chgrp -r user .ssh , chmod 0600 .ssh/*, error persists.

if try change permission chmod 0400 .ssh/*, error is:

permissions 0440 '/cygdrive/c/users/user/.ssh/id_rsa' open.

i don't know why setting same permission want user group.

i trying correct error days , not solve yet.


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