# Interface: `IKernels`

[@jupyterlite/kernel](../modules/jupyterlite_kernel.md).IKernels

An interface for the Kernels service.

## Properties

### `restart`

> **`restart`**: (`id`: `string`) => `Promise`<`IModel`\>

#### Type declaration

> (`id`): `Promise`<`IModel`\>

Restart a kernel.

##### Parameters

| Name | Type     | Description    |
| :--- | :------- | :------------- |
| `id` | `string` | The kernel id. |

##### Returns

`Promise`<`IModel`\>

#### Defined in

[packages/kernel/src/tokens.ts:42](https://github.com/jupyterlite/jupyterlite/blob/7971e0aa/packages/kernel/src/tokens.ts#L42)

### `shutdown`

> **`shutdown`**: (`id`: `string`) => `Promise`<`void`\>

#### Type declaration

> (`id`): `Promise`<`void`\>

Shut down a kernel.

##### Parameters

| Name | Type     | Description    |
| :--- | :------- | :------------- |
| `id` | `string` | The kernel id. |

##### Returns

`Promise`<`void`\>

#### Defined in

[packages/kernel/src/tokens.ts:49](https://github.com/jupyterlite/jupyterlite/blob/7971e0aa/packages/kernel/src/tokens.ts#L49)

### `startNew`

> **`startNew`**: (`options`:
> [`IKernelOptions`](jupyterlite_kernel.Kernels.IKernelOptions.md)) =>
> `Promise`<`IModel`\>

#### Type declaration

> (`options`): `Promise`<`IModel`\>

Start a new kernel.

##### Parameters

| Name      | Type                                                             | Description                 |
| :-------- | :--------------------------------------------------------------- | :-------------------------- |
| `options` | [`IKernelOptions`](jupyterlite_kernel.Kernels.IKernelOptions.md) | The kernel startup options. |

##### Returns

`Promise`<`IModel`\>

#### Defined in

[packages/kernel/src/tokens.ts:35](https://github.com/jupyterlite/jupyterlite/blob/7971e0aa/packages/kernel/src/tokens.ts#L35)