Comment ce connecter sur une VM Linux en SSH ?

Question

Nous souhaitons nous connecter à une VM Linux dans AZURE mais nous ne comprenons pas la connexion en SSH.

La clef SSH est-elle unique par profil ou poste de travail ? Quel impact si régénération d'une clef ?

Comment trouver le chemin de la commande SSH ?

Answer 1

Hello Jean-Manuel VILLEGAS

Connecting to a Linux VM in Azure using SSH involves several steps.

Generate SSH Key Pair (if not already done):

If you haven't already, you'll need to generate an SSH key pair on your local machine. This key pair consists of a private key (usually named id_rsa) and a public key (usually named id_rsa.pub). You can generate a key pair using the ssh-keygen command.

ssh-keygen -t rsa -b 4096 -C "your_email@example.com"

Add the Public Key to Azure:

In the Azure portal, navigate to your Virtual Machine's settings. Under the "Settings" section, you'll find "SSH keys" or "Password reset." Add the contents of your id_rsa.pub (the public key) to the list of authorized keys. This step allows your VM to authenticate you based on your public key.

Connect to the VM:

Once your public key is added to the VM, you can use the ssh command to connect to it.

Open your SSH client. If you're using a Linux or macOS machine, you can use the built-in terminal. If you're using Windows, you can use a third-party SSH client like PuTTY.

ssh username@public_ip_address

If you generated your SSH key pair in a custom location, you can specify the private key's path using the -i option:

ssh -i /path/to/private/key username@public_ip_address

Regarding your question about SSH keys, SSH keys are unique per user profile. Regenerating a new key pair will not impact existing connections, but you will need to add the new public key to the VM to continue connecting. It's a good practice to rotate your keys periodically for security reasons.

To find the path of the SSH command, you can run the following command in your terminal:

which ssh

Ref: https://learn.microsoft.com/en-us/troubleshoot/azure/virtual-machines/troubleshoot-ssh-connection

Hope this helps.