---
title: Set
url: https://docs.vultr.com/reference/vultr-cli/instance/user-data/set
description: Updates cloud-init user data for an existing Vultr instance to modify its configuration post-deployment.
publish_date: 2025-09-14T03:06:48.737778Z
last_updated: 2025-11-07T17:47:45.168889Z
---

The `vultr-cli instance user-data set` command updates the cloud-init user data for a specified Vultr instance, allowing you to modify instance configuration after deployment.

## Usage

```console
$ vultr-cli instance user-data set <Instance ID> [flags]
```

## Flags
| Shorthand | Long Version | Description |
|-----------|--------------|-------------|
| -d | --userdata | The file to read userdata from |