> ## Documentation Index
> Fetch the complete documentation index at: https://docs.gcore.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Install an OS from an ISO image in VMmanager 6

> Mount an ISO image in VMmanager 6 to install an operating system, then connect via VNC and disconnect the image after setup.

[VMmanager 6](/hosting/virtual-servers/manage/main-features-and-functions-of-vmmanager-6) supports installing an operating system from a custom ISO image. Provide a public HTTP, HTTPS, or FTP URL to an ISO file (up to 8 GB). Only one ISO image can be mounted to a server at a time.

> [!NOTE]
>
> During ISO installation, the following operations are unavailable: root password editing, creating ISO images, and running automation scripts while the ISO is loading.

**1. Open VMmanager 6**

Log in to the [Hosting portal](https://hosting.gcore.com/billmgr), navigate to **Products/Services** → **Virtual private servers**, select the checkbox next to the server, and click **To panel**.

![BILLmanager Virtual private servers list with a server row selected and To panel button highlighted in the toolbar](https://mintcdn.com/gcore/bP_M3iNvkCNJWoX1/images/docs/hosting/virtual-servers/manage/operating-system/install-an-os-from-iso-in-vmmanager-6/install-an-os-from-iso-in-vmmanager-6-image1.png?fit=max\&auto=format\&n=bP_M3iNvkCNJWoX1\&q=85\&s=2273bd7f54ceb16b1cab2afe8cae025e)

**2. Open the ISO mount menu**

In VMmanager, open the three-dot menu next to the server and select **Mount ISO-image**.

![VMmanager Virtual machines list with the three-dot menu open and Mount ISO-image highlighted](https://mintcdn.com/gcore/bP_M3iNvkCNJWoX1/images/docs/hosting/virtual-servers/manage/operating-system/install-an-os-from-iso-in-vmmanager-6/install-an-os-from-iso-in-vmmanager-6-image2.png?fit=max\&auto=format\&n=bP_M3iNvkCNJWoX1\&q=85\&s=7a309daba582c9f4f55ee77643a70e05)

**3. Enter the ISO URL**

Enter the URL where the ISO image is hosted. Optionally, add **Tags** to trigger VMmanager automation scripts that have matching tag values.

![Mount ISO-image dialog with URL field and Tags field](https://mintcdn.com/gcore/bP_M3iNvkCNJWoX1/images/docs/hosting/virtual-servers/manage/operating-system/install-an-os-from-iso-in-vmmanager-6/install-an-os-from-iso-in-vmmanager-6-image3.png?fit=max\&auto=format\&n=bP_M3iNvkCNJWoX1\&q=85\&s=ba9b9b04218a2e0c5f2341196dc16dbc)

**4. Mount and install**

Click **Download and connect**. VMmanager downloads the ISO and restarts the server from it. Connect via [VNC](/hosting/virtual-servers/manage/connect/connect-to-a-virtual-server-via-vnc) and follow the installer prompts to complete the OS setup.

> [!NOTE]
>
> After the installation is complete, disconnect the ISO image to restore normal boot: open **Virtual disk** in the left sidebar, disconnect the mounted ISO image, and restart the server.