linux-ed25519-added-note

Author: Vamsi Kavuru

articles/virtual-machines/linux-vm-connect.md

@@ -16,6 +16,9 @@ When hosting a Linux virtual machine on Azure, the most common method for access
 
 This document describes how to connect, via SSH, to a VM that has a public IP. If you need to connect to a VM without a public IP, see [Azure Bastion Service](../bastion/bastion-overview.md).
 
+> [!Note]
+> ED25519 SSH key support for Linux VMs is now in preview across Azure public cloud regions, with plans to expand to sovereign clouds shortly.
+
 ## Prerequisites
 
 - You need an SSH key pair. If you don't already have one, Azure creates a key pair during the deployment process. If you need help with creating one manually, see [Create and use an SSH public-private key pair for Linux VMs in Azure](./linux/mac-create-ssh-keys.md).

articles/virtual-machines/linux/create-ssh-keys-detailed.md

@@ -21,6 +21,9 @@ If you want quick commands rather than a more in-depth explaination of SSH keys,
 
 To create SSH keys and use them to connect to a Linux VM from a **Windows** computer, see [How to use SSH keys with Windows on Azure](ssh-from-windows.md). You can also use the [Azure portal](../ssh-keys-portal.md) to create and manage SSH keys for creating VMs in the portal.
 
+> [!Note]
+> ED25519 SSH key support for Linux VMs is now in preview across Azure public cloud regions, with plans to expand to sovereign clouds shortly.
+
 [!INCLUDE [virtual-machines-common-ssh-overview](../../../includes/virtual-machines-common-ssh-overview.md)]
 
 [!INCLUDE [virtual-machines-common-ssh-support](../../../includes/virtual-machines-common-ssh-support.md)]
@@ -191,7 +194,7 @@ To create a Linux VM that uses SSH keys for authentication, provide your SSH pub
 
 If you're not familiar with the format of an SSH public key, you can see your public key by running `cat` as follows, replacing `~/.ssh/id_rsa.pub` with your own public key file location:
 
-# RSA key pair
+### RSA key pair
 ```bash
 cat ~/.ssh/id_rsa.pub
 ```
@@ -215,7 +218,7 @@ ssh-keygen \
 -m RFC4716 > ~/.ssh/id_ssh2.pem
 ```
 
-# ED25519 key pair
+### ED25519 key pair
 ```bash
 cat ~/.ssh/id_ed25519.pub
 ```

articles/virtual-machines/linux/mac-create-ssh-keys.md

@@ -28,6 +28,9 @@ For additional ways to generate and use SSH keys on a Windows computer, see [How
 
 [!INCLUDE [virtual-machines-common-ssh-support](../../../includes/virtual-machines-common-ssh-support.md)]
 
+> [!Note]
+> ED25519 SSH key support for Linux VMs is now in preview across Azure public cloud regions, with plans to expand to sovereign clouds shortly.
+
 ## Create an SSH key pair
 
 Use the `ssh-keygen` command to generate SSH public and private key files. By default, these files are created in the ~/.ssh directory. You can specify a different location, and an optional password (*passphrase*) to access the private key file. If an SSH key pair with the same name exists in the given location, those files are overwritten.
@@ -66,7 +69,7 @@ To create a Linux VM that uses SSH keys for authentication, specify your SSH pub
 
 If you're not familiar with the format of an SSH public key, you can display your public key with the following `cat` command, replacing `~/.ssh/id_rsa.pub` with the path and filename of your own public key file if needed:
 
-# RSA key pair
+### RSA key pair
 ```bash
 cat ~/.ssh/id_rsa.pub
 ```
@@ -75,7 +78,7 @@ A typical RSA public key value looks like this example:
 ```output
 ssh-rsa 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 username@domainname
 ```
-# ED25519 key pair
+### ED25519 key pair
 ```bash
 cat ~/.ssh/id_ed25519.pub
 ```

articles/virtual-machines/linux/ssh-from-windows.md

@@ -20,6 +20,9 @@ This article is for Windows users who want to [create](#create-an-ssh-key-pair)
 
 To use SSH keys from a Linux or macOS client, see the [quick steps](mac-create-ssh-keys.md). For a more detailed overview of SSH, see [Detailed steps: Create and manage SSH keys for authentication to a Linux VM in Azure](create-ssh-keys-detailed.md).
 
+> [!Note]
+> ED25519 SSH key support for Linux VMs is now in preview across Azure public cloud regions, with plans to expand to sovereign clouds shortly.
+
 ## Overview of SSH and keys
 
 [SSH](https://www.ssh.com/ssh/) is an encrypted connection protocol that allows secure sign-ins over unsecured connections. SSH is the default connection protocol for Linux VMs hosted in Azure. Although SSH itself provides an encrypted connection, using passwords with SSH still leaves the VM vulnerable to brute-force attacks. We recommend connecting to a VM over SSH using a public-private key pair, also known as *SSH keys*.

articles/virtual-machines/ssh-keys-azure-cli.md

@@ -22,6 +22,9 @@ For more information, see [Detailed steps: Create and manage SSH keys for authen
 
 For more information on how to create and use SSH keys with Linux VMs, see [Use SSH keys to connect to Linux VMs](./linux/ssh-from-windows.md).
 
+> [!Note]
+> ED25519 SSH key support for Linux VMs is now in preview across Azure public cloud regions, with plans to expand to sovereign clouds shortly.
+
 ## Generate new keys
 
 1. After you sign in, use the [az sshkey create](/cli/azure/sshkey#az-sshkey-create) command to create the new SSH key: