How can I get the ssh host key for a new Azure Linux VM created using PowerShell?

azure ssh azure-vm-role
Oliver Bock picture Oliver Bock · Aug 31, 2015 · Viewed 7.9k times · Source

If I create an Azure Linux VM using PowerShell, how can I get its new ssh host key, so that I can install it in my local ssh/putty? Preferably the solution is also PowerShell code.

Answer

mwik picture mwik · Feb 19, 2018

Old question, but for newcomers there is nowadays an alternative available by using run-command in Azure CLI. There is probably an equivalent for PowerShell too, but I have not investigated that.

az vm run-command invoke --name <your-vm-name> --command-id RunShellScript --scripts "cat /etc/ssh/ssh_host_ecdsa_key.pub"

will output a json document from which you can extract the public key. Beware though that this process is incredibly slow (~30 seconds per host), but you only need to run it once. See this gist for an example of how to update the known_hosts file with Ansible.

Related questions

Cannot SSH to Azure VM

I have a Ubuntu VM on Azure (Resource Group, not the Classic VM) and it all worked out of the box. I recently tried to SSH into the VM using Putty and I could not. I get the error: Network …

Read More
How can I find or change my password and login for windows Azure?

It's really big problem for me - ugly UI, where I can't see ssh connection requisites for my new virtual machine instance. Is it possible to change password? Password and login from my manage.windowsazure.com panel is not approach.

Read More
OpenSSH SSH-2 private key (old PEM format) on Azure Linux VM

I've been using Puttygen to generate SSH Key pair for Azure Linux VM. recently i found openssh is available on Windows 10 and i can use "ssh-keygen" command on Windows 10 CMD and generate Private and Public Key. I've tried this but …

Read More