无法通过 SSH 连接到 EC2 实例 pem '.ssh/intuit-tke-qe.pem' 的权限 0777 太开放了'

Question

I'm unable to ssh into my EC2 instance, seems to be an issue with the permission level of the ssh .pem file I'm passing to ssh, googling around this seems to be a problem many others have faced but their solutions didn't work for me.

Here is what I tried, someone please help...

Atempt 1:

asemani$ ssh -i ~/.ssh/secure.pem root@54.210.0.1

********************************************************************************
This is a private computer system containing information that is proprietary
and confidential to the owner of the system.  Only individuals or entities
authorized by the owner of the system are allowed to access or use the system.
Any unauthorized access or use of the system or information is strictly
prohibited.

All violators will be prosecuted to the fullest extent permitted by law.
********************************************************************************
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@         WARNING: UNPROTECTED PRIVATE KEY FILE!          @
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
Permissions 0777 for '.ssh/secure.pem' are too open.
It is required that your private key files are NOT accessible by others.
This private key will be ignored.
Load key ".ssh/secure.pem": bad permissions
Permission denied (publickey).

Attempt 2:

asemani$ chmod 600 ~/.ssh/secure.pem 
asemani$ ls -l ~/.ssh/
total 56
-rw-r--r--  1 asemani  CORP\Domain Users    782 Apr 29 11:14 config
-rw-------@ 1 asemani  CORP\Domain Users   1696 Apr 29 21:32 secure.pem
asemani$ 
asemani$ ssh -i .ssh/secure.pem root@54.210.0.1
********************************************************************************
This is a private computer system containing information that is proprietary
and confidential to the owner of the system.  Only individuals or entities
authorized by the owner of the system are allowed to access or use the system.
Any unauthorized access or use of the system or information is strictly
prohibited.

All violators will be prosecuted to the fullest extent permitted by law.
********************************************************************************
Permission denied (publickey).

I don't get the warning anymore but Permission is still denied. I then also tried doing a chmod 400 on the .pem file but that also didn't work. I won't paste that here since that may be overkill.

What is happening here? How can I ssh into my ec2? This should be a simple thing??

Answer 1

将权限更改为chmod 400 ~/.ssh/secure.pem

Answer 2

You need to launch the instance through your AWS EC2 management console. Once it is launched, copy the public DNS IPv4 and paste it after the linux distribution name being used (eg ubuntu@IPv4). Also, make sure you are working in the directory that houses your private access key.

For clarification, once your EC2 instance is launched and you're in the directory that holds your private access key, type in the following in the command-line:

ssh -i private_access_key.pem linux@IPv4

Answer 3

Are you able to login as the default user using your pem key? For Ubuntu instances, default user should be ubuntu ; for most other instances it should be ec2-user . If you're able to login as the default user, chances are that root isn't allowed for ssh login. To change that, login as the default user and do the following:

# Edit sshd_config and modify 'PermitRootLogin XX' to 'PermitRootLogin yes'
sudo vi /etc/ssh/sshd_config

# Reload sshd configuration
sudo service sshd reload