Azure VM creation using ssh public key source=use existing public key

Question

Azure VM creation using ssh public key source=use existing public key

Santosh Reddy 21

Greetings,

I created a VM using "use existing public key". When I try logging into Linux Server using SSH, I'm getting error as "Permission denied (publickey)". In case if I select "use existing key stored in Azure", it is working as expected.

Can you please suggest why I'm getting this error.

Regards,
Santosh

srbhatta-MSFT 8,586 Reputation points Microsoft Employee

2022-03-10T09:46:43.71+00:00

Hi @Santosh Reddy , thanks for posting your query on Microsoft QnA. What is the Linux distro that the VM is using?
Santosh Reddy 21 Reputation points

2022-03-10T10:11:52.707+00:00

Linux (ubuntu 18.04)
srbhatta-MSFT 8,586 Reputation points Microsoft Employee

2022-03-11T05:15:06.247+00:00

Hi @Santosh Reddy ,
Any update on whether the below answer helped you to resolve your query? Please don't forget to and if you think the information provided was useful so that it can help others in the community looking for help on similar issues.

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srbhatta-MSFT 8,586 Reputation points Microsoft Employee

2022-03-10T09:46:43.71+00:00

Hi @Santosh Reddy , thanks for posting your query on Microsoft QnA. What is the Linux distro that the VM is using?
Santosh Reddy 21 Reputation points

2022-03-10T10:11:52.707+00:00

Linux (ubuntu 18.04)
srbhatta-MSFT 8,586 Reputation points Microsoft Employee

2022-03-11T05:15:06.247+00:00

Hi @Santosh Reddy ,
Any update on whether the below answer helped you to resolve your query? Please don't forget to and if you think the information provided was useful so that it can help others in the community looking for help on similar issues.

Answer 1

srbhatta-MSFT 8,586 Microsoft Employee

Hi @Santosh Reddy ,
Can you reset the password from portal using Reset password option. Select Reset SSH keys. Type in the username and again paste the public key. Make sure that no extra spaces or line is added. Select update. Then try reconnecting via SSH, it should work. Incase it doesn't , there are high chances the public key might have been modified. In this case, re-generate a public and private key pair, and reset the SSH keys for the same user with the newly generated public key, and update it. Let me know how it goes.

Please refer to the screenshot below.

Santosh Reddy 21 Reputation points

2022-03-10T14:20:29.067+00:00

Thanks @srbhatta-MSFT for the quick response. Manually it may work when we update.
Need a solution after creating VM, we should be able to login.

Can you please check.
srbhatta-MSFT 8,586 Reputation points Microsoft Employee

2022-03-10T14:27:29.837+00:00

@Santosh Reddy , yes it should work after creating the VM also. You will have to put the correct SSH keys (that is, you will have to provide the correct public key on the portal and store the private key in your local machine), or you can even login with username password. Let me know if I am missing to understand something related to your your scenario.
Santosh Reddy 21 Reputation points

2022-03-11T05:44:06.59+00:00
@srbhatta-MSFT I've generated SSH key from Azure and used same key. When I enter public key, it is being successfully verified. Not sure why there is a difference seen b/w selected key available on Azure v/s entering public key manually.

Steps to replicate the issue

Create a public key in Azure portal

Copy the public key

while creating VM, select SSH public key source as "use existing public key" and paste the copied one from step 2 and create VM

run SSH command, we can see the public key permission denied error
srbhatta-MSFT 8,586 Reputation points Microsoft Employee

2022-03-11T05:50:38.893+00:00

@Santosh Reddy , are you sure you are not putting any extra spaces or line while pasting the public key?
Santosh Reddy 21 Reputation points

2022-03-14T08:54:32.227+00:00

Hi @srbhatta-MSFT , issue got resolved. There was some issue with public key. Thanks for the responses.
srbhatta-MSFT 8,586 Reputation points Microsoft Employee

2022-03-14T09:05:33.983+00:00

@Santosh Reddy , correct, just as I had guessed. Thanks for updating us. Glad it got resolved now.

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Azure VM creation using ssh public key source=use existing public key

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