How to Attach a Custom ISO to a Vultr Optimized Cloud Compute Instance

1 min readUpdated 26 May 2026

ISO images allow you to install a specific operating system on an Vultr Optimized Cloud Compute instance. Custom ISOs enable you to deploy operating systems not available in the default Vultr installer list. They are useful for creating tailored environments or booting into specialized modes, such as rescue and recovery environments.

Follow this guide to attach a custom ISO to a Vultr Optimized Cloud Compute instance using the Vultr Console, API, CLI, or Terraform.

Warning

Installing a custom ISO on a Vultr Optimized Cloud Compute instance disables the default user credentials listed in your instance's management page.

Navigate to Products and click Compute.
Click your target Vultr Optimized Cloud Compute instance to open its management page.
Navigate to the Settings tab.
Find and click Custom ISO on the left navigation menu.
Select a custom ISO available in your Vultr account or click the ISO Library drop-down to select from a list of public ISOs.
Click Attach ISO and Reboot to attach the ISO to your instance.

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How to Attach a Custom ISO to a Vultr Optimized Cloud Compute Instance | Vultr Docs