Hi:
I'm a relative newbie to the world of AWS and EC2 instances.
I have an instance created on AWS. I'm having issues logging into the instance through WinSCP. I get the following error message:
'No supported authentication methods available (server sent: publickey).'
I used the PEM file associated with the instance to create a PPK (private key) through Putty-Gen. I was able to log into the instance using Putty & winSCP on machine A.
I'm on a different machine now and attempting to use the same PEM to generate a private key with which to log into the instance with. This is where I run into the errors. It leads me to believe that there are issues with my PEM file. So, I'm trying to figure out how to get to redownload or regenerate the key for that instance through AWS (I am remote right now).
I looked at the log file and I don't see any glaring errors jumping out at me.
I was able to spin off a new instance using the AMI and log into that correctly. I need to get into my original instance because there are important files living off the home directory that I need to replicate.
How do I go about doing this?
Thanks,
JohnB
Aws Ec2 Key Pair
I'm a relative newbie to the world of AWS and EC2 instances.
Once you've created an Amazon EC2 instance running ArcGIS Server, you can log in and begin configuring data and services on the instance. AWS Documentation » Amazon EC2 » User Guide for Windows Instances » Network and Security » Amazon EC2 Key Pairs and Windows Instances. If you don't specify the name of an existing key pair when you launch an instance, you won't be able to connect to the instance. If you created the key pair using AWS, the fingerprint is calculated.
I have an instance created on AWS. I'm having issues logging into the instance through WinSCP. I get the following error message:
'No supported authentication methods available (server sent: publickey).'
I used the PEM file associated with the instance to create a PPK (private key) through Putty-Gen. I was able to log into the instance using Putty & winSCP on machine A.
I'm on a different machine now and attempting to use the same PEM to generate a private key with which to log into the instance with. This is where I run into the errors. It leads me to believe that there are issues with my PEM file. So, I'm trying to figure out how to get to redownload or regenerate the key for that instance through AWS (I am remote right now).
I see that I can create a key pair, but I don't see how that gets associated with a specific AWS instance.
I looked at the log file and I don't see any glaring errors jumping out at me.
I was able to spin off a new instance using the AMI and log into that correctly. I need to get into my original instance because there are important files living off the home directory that I need to replicate.
How do I go about doing this?
Thanks,
JohnB
I need to know of any way to access a running instance in Amazon EC2.
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- I DON'T have the original keypair '.pem' file
- I DO have access to the aws management console
- Terminating/rebooting is not feasible
the closest to my question I have found was this but I hope things have changed since.
is there any way to download that pem file or assign a new keypair?
Community♦
Joaquin BrennerJoaquin Brenner
4 Answers
The keypairs can only be downloaded once from Amazon, presumably for security reasons. What you could do, is assign one of your Elastic IP's to the instance and route traffic through that normally. Snapshot the instance and bring up a duplicate with a new Keypair. Switch the Elastic IP over to the new instance. This is not particularly elegant, but is much less downtime than a full shutdown.
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Note: If you assign the Elastic IP to the instance, it will override the current public IP, so you will have to make sure to update DNS as well.
agrossagross
Actually, you can assign a new keypair to the instance ONLY IF you stop the instance, detach the root partition (usually /dev/sda1) and attach it to another instance.After doing that, you will have access to /home/ubuntu/.ssh/authorized_keys . You can generate a new .pem key via command line and paste it in that file.Then, you detach that partition and re-attach to the original instance. Use the new generated key to connect to it.
You can learn more about these steps in Google, or here: http://www.eng.cam.ac.uk/help/jpmg/ssh/authorized_keys_howto.html
gabrielhpugliesegabrielhpugliese
When you are setting up your AMI's going forward, setup cloud-init. On boot this will pull down the user data and process it accordingly. Therefore you can insert something like the following into the user data box while the AMI is stopped:
Again though, if your cloud-init packages are not installed and running this will be ineffective. I have on more than one occasion had to recover locked out AMI's from developers who don't save their keys. This is a godsend.
Aws Ec2 Lost Key Pair
user1252959user1252959
You can go to EC2 Dashboard, click on 'X Key Pair' (X is a number), Create Key pair. So give it a name, and an option to download it will appear.
IdealmindIdealmind