> For the complete documentation index, see [llms.txt](https://docs.console.zenlayer.com/api-reference/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.console.zenlayer.com/api-reference/compute/vm/virtual-machine-instance/resetinstancespassword.md).

# ResetInstancesPassword

## 1. API Description

This API (ResetInstancesPassword) is used to reset instance login password.

{% hint style="info" %} <mark style="color:blue;">**Note**</mark>

* <mark style="color:blue;">For Windows operating system, call this API to reset Administrator password; for Linux operating system, call this API to reset root password.</mark>
* <mark style="color:blue;">Shut down the instance before resetting the password. After the password is reset, the instance will be automatically restarted.</mark>
* <mark style="color:blue;">Batch operations are supported. The maximum number of instances in each request is 100.</mark>
  {% endhint %}

## 2. Input Parameters

The following request parameter list only provides API request parameters.

| Parameter Name | Required | Type            | Description                                                                                                                                                                                  |
| -------------- | -------- | --------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| instanceIds    | Yes      | Array of String | <p>Instance ID(s).</p><p>The maximum number of instances in each request is 100.</p>                                                                                                         |
| password       | Yes      | String          | <p>Instance login password.</p><p>The parameter must be 8-16 characters, including:lowercase letters: \[a-z]uppercase letters: \[A-Z]digits: 0-9special characters: ! @ # $ % ^ + \* ( )</p> |

## 3. Output Parameters

| Parameter Name | Type   | Description                                                                                                           |
| -------------- | ------ | --------------------------------------------------------------------------------------------------------------------- |
| requestId      | String | <p>The unique request ID, which is returned for each request.</p><p>RequestId is required for locating a problem.</p> |

## 4. Code Example

{% tabs %}
{% tab title="Example" %}
**Reset login password of instances.**

```json
POST /api/v2/vm HTTP/1.1
Host: console.zenlayer.com
Content-Type: application/json
X-ZC-Action: ResetInstancesPassword
<Common Request Params>

Request:
{
  "instanceIds": ["instanceId1", "instanceId2"],
  "password": "Example`123"
}

Response:
{
  "requestId": "TEEFDCA5B-76FB-4E91-A18E-DF7F5D2CE41F",
}
```

{% endtab %}
{% endtabs %}

## 5. Developer Resources

Zenlayer Cloud API 2.0 integrates [SDKs](/api-reference/api-introduction/toolkit/api-sdk.md)，to make it easier for you to call APIs. More programming languages will be supported.

## 6. Error Codes

The following only lists the error codes related to the API business logic. For other error codes, see [Common Error Codes](/api-reference/api-introduction/instruction/commonerrorcode.md).

| HTTP Status Code | Error Code                                | Description                                                     |
| ---------------- | ----------------------------------------- | --------------------------------------------------------------- |
| 404              | INVALID\_INSTANCE\_NOT\_FOUND             | Instance does not exist.                                        |
| 403              | OPERATION\_DENIED\_INSTANCE\_NOT\_RUNNING | Only operations on instances in `RUNNING` status are supported. |