[ssh] SSH 키 : ” ‘id_rsa.pub’에 대한 권한 0644가 너무 열려 있습니다.” 맥에서

내 Mac에서 ssh 키 페어를 생성하고 공개 키를 내 우분투 서버 (사실 내 맥의 가상 컴퓨터)에 추가하지만 우분투 서버에 로그인하려고하면 다음과 같이 말합니다.

@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@         WARNING: UNPROTECTED PRIVATE KEY FILE!          @
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
Permissions 0644 for '/Users/tudouya/.ssh/vm/vm_id_rsa.pub' 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: /Users/tudouya/.ssh/vm/vm_id_rsa.pub
Permission denied (publickey,password).

이 문제를 해결하고 키 파일 모드를 변경하고 폴더 모드를 변경하는 여러 가지 방법을 시도했지만 stackoverflow에 대한 답변으로 작동하지 않습니다.
키 파일 권한 :

vm dir:
drwxr-xr-x   4 tudouya  staff    136  4 29 10:37 vm

key file:
-rw-------  1 tudouya  staff  1679  4 29 10:30 vm_id_rsa
-rw-r--r--  1 tudouya  staff   391  4 29 10:30 vm_id_rsa.pub

나에게 몇 가지 아이디어를 알려주십시오 … =========================================

I ssh_config에 호스트 정보를 작성하십시오.

Host ubuntuvm
    Hostname 10.211.55.17
    PreferredAuthentications publickey
    IdentityFile /Users/tudouya/.ssh/vm/vm_id_rsa.pub

“ssh -v ubuntuvm”명령을 실행하면 다음이 표시됩니다.

ssh -v ubuntuvm
OpenSSH_6.2p2, OSSLShim 0.9.8r 8 Dec 2011
debug1: Reading configuration data /etc/ssh_config
debug1: /etc/ssh_config line 20: Applying options for *
debug1: /etc/ssh_config line 103: Applying options for *
debug1: /etc/ssh_config line 175: Applying options for ubuntuvm
debug1: Connecting to 10.211.55.17 [10.211.55.17] port 22.
debug1: Connection established.
debug1: identity file /Users/tudouya/.ssh/vm/vm_id_rsa.pub type 1
debug1: identity file /Users/tudouya/.ssh/vm/vm_id_rsa.pub-cert type -1
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_6.2
debug1: Remote protocol version 2.0, remote software version OpenSSH_6.6.1p1 Ubuntu-8
debug1: match: OpenSSH_6.6.1p1 Ubuntu-8 pat OpenSSH*
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: server->client aes128-ctr hmac-md5-etm@openssh.com none
debug1: kex: client->server aes128-ctr hmac-md5-etm@openssh.com none
debug1: SSH2_MSG_KEX_DH_GEX_REQUEST(1024<1024<8192) sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_GROUP
debug1: SSH2_MSG_KEX_DH_GEX_INIT sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_REPLY
debug1: Server host key: RSA 55:6d:4f:0f:23:51:ac:8e:70:01:ec:0e:62:9e:1c:10
debug1: Host '10.211.55.17' is known and matches the RSA host key.
debug1: Found key in /Users/tudouya/.ssh/known_hosts:54
debug1: ssh_rsa_verify: signature correct
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug1: SSH2_MSG_NEWKEYS received
debug1: Roaming not allowed by server
debug1: SSH2_MSG_SERVICE_REQUEST sent
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug1: Authentications that can continue: publickey,password
debug1: Next authentication method: publickey
debug1: Offering RSA public key: /Users/tudouya/.ssh/vm/vm_id_rsa.pub
debug1: Server accepts key: pkalg ssh-rsa blen 279
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@         WARNING: UNPROTECTED PRIVATE KEY FILE!          @
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
Permissions 0644 for '/Users/tudouya/.ssh/vm/vm_id_rsa.pub' 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: /Users/tudouya/.ssh/vm/vm_id_rsa.pub
debug1: No more authentication methods to try.
Permission denied (publickey,password).

답변

debug1: identity file /Users/tudouya/.ssh/vm/vm_id_rsa.pub type 1

IdentityFile .../.ssh/vm/vm_id_rsa.pub

IdentityFile .../.ssh/vm/vm_id_rsa

chmod 400 ~ / .ssh / id_rsa

chmod 400 ~/.ssh/Key file
chmod 400 ~/.ssh/vm_id_rsa.pub

chmod 400 path/to/filename

sudo chmod 600 /path/to/my/key.pem