Grid Keygen Machine
Quick steps: Create and use an SSH public-private key pair for Linux VMs in Azure. 4 minutes to read.In this articleWith a secure shell (SSH) key pair, you can create virtual machines (VMs) in Azure that use SSH keys for authentication, eliminating the need for passwords to sign in. This article shows you how to quickly generate and use an SSH public-private key file pair for Linux VMs.
You can complete these steps with the Azure Cloud Shell, a macOS or Linux host, the Windows Subsystem for Linux, and other tools that support OpenSSH. NoteVMs created using SSH keys are by default configured with passwords disabled, which greatly increases the difficulty of brute-force guessing attacks.For more background and examples, see.For additional ways to generate and use SSH keys on a Windows computer, see.
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Supported SSH key formatsAzure currently supports SSH protocol 2 (SSH-2) RSA public-private key pairs with a minimum length of 2048 bits. Other key formats such as ED25519 and ECDSA are not supported. Create an SSH key pairUse 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.The following command creates an SSH key pair using RSA encryption and a bit length of 4096: ssh-keygen -m PEM -t rsa -b 4096If you use the to create your VM with the command, you can optionally generate SSH public and private key files using the -generate-ssh-keys option.
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The key files are stored in the /.ssh directory unless specified otherwise with the -ssh-dest-key-path option. The -generate-ssh-keys option will not overwrite existing key files, instead returning an error.