Exercise - Test your new virtual machine

  • 3 minutes

When you create a virtual machine, you assign it a public IP address that's reachable over the internet and a private IP address used within the Azure datacenter. Both of these values appear in the JSON block the create command returns, like the following:

{
   ...
  "privateIpAddress": "10.0.0.4",
  "publicIpAddress": "40.83.165.85",
   ...
}

Note

This exercise is optional. If you want to complete this exercise, you'll need to create an Azure subscription before you begin. If you don't have an Azure account or you don't want to create one at this time, you can read through the instructions so you understand the information that's being presented.

Note

In this unit, you use Azure Cloud Shell as a terminal. You can access Cloud Shell through the Azure portal or the Cloud Shell sign-in. You don't have to install anything on your PC or laptop to use it.

Connecting to the VM with SSH

We can quickly test that the Linux VM is up and running by using the public IP address in the Secure Shell (ssh) tool. Remember that we set our admin name to azureuser, so we need specify that. Make sure to use the public IP address from your running instance.

ssh azureuser@<public-ip-address>

Note

We don't need a password because we generated an SSH key pair as part of the VM creation. The first time you shell into the VM, you receive a prompt regarding the authenticity of the host.

This is because we're attempting to access an IP address directly instead of through a host name. Answering yes saveS the IP address as a valid host for connection and allows the connection to proceed.

The authenticity of host '40.83.165.85 (40.83.165.85)' can't be established.
RSA key fingerprint is SHA256:hlFnTCAzgWVFiMxHK194I2ap6+5hZoj9ex8+/hoM7rE.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added '40.83.165.85' (RSA) to the list of known hosts.

Then, you are presented with a remote shell where you can enter Linux commands.

Welcome to Ubuntu 18.04.3 LTS (GNU/Linux 5.0.0-1014-azure x86_64)

 * Documentation:  https://help.ubuntu.com
 * Management:     https://landscape.canonical.com
 * Support:        https://ubuntu.com/advantage

  System information as of Wed Aug 21 20:32:04 UTC 2019

  System load:  0.0               Processes:           108
  Usage of /:   4.2% of 28.90GB   Users logged in:     0
  Memory usage: 9%                IP address for eth0: 10.0.0.5
  Swap usage:   0%

0 packages can be updated.
0 updates are security updates.

The programs included with the Ubuntu system are free software;
the exact distribution terms for each program are described in the
individual files in /usr/share/doc/*/copyright.

Ubuntu comes with ABSOLUTELY NO WARRANTY, to the extent permitted by
applicable law.

To run a command as administrator (user "root"), use "sudo <command>".
See "man sudo_root" for details.

azureuser@SampleVM:~$

Try a few commands, such as ps or ls, as practice. When you're finished, sign out of the virtual machine by typing exit or logout.