How do I create a host key file to use with my applications as I can not use system defined /etc/ssh/ssh_host_rsa_key for non-root account under Linux / Unix / Apple OS X / *BSD operating systems?
You need to use a command called ssh-keygen. This command generates, manages and converts authentication keys for ssh. It can create RSA keys for use by SSH protocol version 1 and RSA or DSA keys for use by SSH protocol version 2. he type of key to be generated is specified with the -t option. If invoked without any arguments, ssh-keygen will generate an RSA key for use in SSH protocol 2 connections. The -f option specifies the filename of the key file.

  1. Generate Ssh Key Github
  2. Freebsd Ssh Generate Host Key On Facebook
  3. Freebsd Ssh Generate Host Key On Windows 10
  4. Generating A New Ssh Key
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Why create a new host key files?

You may need a new key file:

Oct 29, 2012 It can create RSA keys for use by SSH protocol version 1 and RSA or DSA keys for use by SSH protocol version 2. He type of key to be generated is specified with the -t option. If invoked without any arguments, ssh-keygen will generate an RSA key for use in SSH protocol 2 connections.

  • Using your ssh3 key with Putty. Pick a host and pick 'ssh' Pick SSH protocol 2; Tell it to use your ssh key by drilling down the menu path: Connection-SSH-ssh key: (see figures 7). Now save your settings because you're going to be using this key a lot from now on.
  • Jun 09, 2018 H ow do I regenerate OpenSSH sshd server host keys stored in /etc/ssh/sshhost. files? Can I safely regenerate ssh host keys using remote ssh session as my existing ssh connections shouldn’t be interrupted on Debian or Ubuntu Linux?
  1. Your system is compromised.
  2. Your keys are stolen.
  3. You forgotten the passphrase.
  4. Your application need a new host key.
  5. You can not read the default system key files stored in /etc/ssh/ directory but your non-root application needs key.
  6. You got an error message which read as “Could not load host key: /etc/ssh/ssh_host_key*”.

ssh-keygen Syntax

The syntax is:

Example

Create a host key file in your $HOME/.ssh/myapp as follows. First, create a directory to store your host key file, enter:
$ mkdir -p $HOME/.ssh/myapp
To create a host RSAv2 key file, run:
$ ssh-keygen -t rsa -f $HOME/.ssh/myapp/rsa_key_file
Sample outputs:

Generate Ssh Key Github

Type the following commands to verify the keys:
$ ls -l $HOME/.ssh/myapp/
Sample outputs:

You can now use keys with your app:
$ mycool-app -key $HOME/.ssh/myapp/rsa_key_file -d

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This article provides an overview of running a FreeBSD virtual machine in Azure.

Overview

FreeBSD for Microsoft Azure is an advanced computer operating system used to power modern servers, desktops, and embedded platforms.

Microsoft Corporation is making images of FreeBSD available on Azure with the Azure VM Guest Agent pre-configured. Currently, the following FreeBSD versions are offered as images by Microsoft:

The agent is responsible for communication between the FreeBSD VM and the Azure fabric for operations such as provisioning the VM on first use (user name, password or SSH key, host name, etc.) and enabling functionality for selective VM extensions.

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As for future versions of FreeBSD, the strategy is to stay current and make the latest releases available shortly after they are published by the FreeBSD release engineering team.

Create a FreeBSD VM through Azure CLI on FreeBSD

First you need to install Azure CLI though following command on a FreeBSD machine.

If bash is not installed on your FreeBSD machine, run following command before the installation.

If python is not installed on your FreeBSD machine, run following commands before the installation.

During the installation, you are asked Modify profile to update your $PATH and enable shell/tab completion now? (Y/n). If you answer y and enter /etc/rc.conf as a path to an rc file to update, you may meet the problem ERROR: [Errno 13] Permission denied. To resolve this problem, you should grant the write right to current user against the file etc/rc.conf.

Now you can sign in to Azure and create your FreeBSD VM. Below is an example to create a FreeBSD 11.0 VM. You can also add the parameter --public-ip-address-dns-name with a globally unique DNS name for a newly created Public IP.

Then you can sign in to your FreeBSD VM through the ip address that printed in the output of above deployment.

VM extensions for FreeBSD

Freebsd Ssh Generate Host Key On Facebook

Following are supported VM extensions in FreeBSD.

VMAccess

The VMAccess extension can:

  • Reset the password of the original sudo user.
  • Create a new sudo user with the password specified.
  • Set the public host key with the key given.
  • Reset the public host key provided during VM provisioning if the host key is not provided.
  • Open the SSH port (22) and restore the sshd_config if reset_ssh is set to true.
  • Remove the existing user.
  • Check disks.
  • Repair an added disk.

CustomScript

The CustomScript extension can:

  • If provided, download the customized scripts from Azure Storage or external public storage (for example, GitHub).
  • Run the entry point script.
  • Support inline commands.
  • Convert Windows-style newline in shell and Python scripts automatically.
  • Remove BOM in shell and Python scripts automatically.
  • Protect sensitive data in CommandToExecute.

Note

FreeBSD VM only supports CustomScript version 1.x by now.

Authentication: user names, passwords, and SSH keys

When you're creating a FreeBSD virtual machine by using the Azure portal, you must provide a user name, password, or SSH public key.User names for deploying a FreeBSD virtual machine on Azure must not match names of system accounts (UID <100) already present in the virtual machine ('root', for example).Currently, only the RSA SSH key is supported. A multiline SSH key must begin with ---- BEGIN SSH2 PUBLIC KEY ---- and end with ---- END SSH2 PUBLIC KEY ----.

Freebsd Ssh Generate Host Key On Windows 10

Obtaining superuser privileges

The user account that is specified during virtual machine instance deployment on Azure is a privileged account. The package of sudo was installed in the published FreeBSD image.After you're logged in through this user account, you can run commands as root by using the command syntax.

You can optionally obtain a root shell by using sudo -s.

Known issues

The Azure VM Guest Agent version 2.2.2 has a known issue that causes the provision failure for FreeBSD VM on Azure. The fix was captured by Azure VM Guest Agent version 2.2.3 and later releases.

Parts

Next steps

Generating A New Ssh Key

  • Go to Azure Marketplace to create a FreeBSD VM.