Following the deployment of your workload, post-deployment configuration is needed. If you want to do this as a part of your automation solution, then there are two options:

• The custom script extension, which can be used at any time after the deployment.
• cloud-init is available during boot.

Initial Configuration with the Custom Script Extension

After the deployment of the VM, it is possible to execute post-deployment scripts using the custom script extension. In the previous example, we were deploying a VM using ARM templates. What if you want to run a script after deployment? This is the role of the custom script extension. For example, let's assume you want to deploy a VM, and after deployment, you want to install Apache on it without logging in to the VM. In this case, we will write a script to install Apache and Apache will be installed after deployment using the custom script extension.

This extension will work on all Microsoft...