> ## 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 operating system from a template in VMmanager 6

> Reinstall an operating system from a template in VMmanager 6, choosing a distribution and version, with optional post-install scripts.

[VMmanager 6](/hosting/virtual-servers/manage/main-features-and-functions-of-vmmanager-6) provides OS templates for reinstalling the operating system on a virtual server. Available distributions include CentOS, Debian, FreeBSD, and Ubuntu. The exact versions depend on the current template catalog.

> [!WARNING]
>
> Reinstalling the operating system permanently deletes all data on the system disk. Back up any important files before proceeding.

**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**.

**2. Open the Reinstall OS menu**

In VMmanager, open the three-dot menu next to the server and select **Reinstall OS**.

![VMmanager 6 Virtual machines list with the three-dot menu open and Reinstall OS option highlighted](https://mintcdn.com/gcore/bP_M3iNvkCNJWoX1/images/docs/hosting/virtual-servers/manage/operating-system/install-an-os-from-a-template-in-vmmanager-6/1-menu.png?fit=max\&auto=format\&n=bP_M3iNvkCNJWoX1\&q=85\&s=c4266f04b836baa280ef0e370e5c9831)

**3. Select an OS template**

Choose a distribution from the available templates and select the version from the dropdown.

![Reinstall OS page showing OS template tiles for CentOS, Debian, FreeBSD, and Ubuntu with Applications and scripts section and VM password field](https://mintcdn.com/gcore/bP_M3iNvkCNJWoX1/images/docs/hosting/virtual-servers/manage/operating-system/install-an-os-from-a-template-in-vmmanager-6/2-configuration-options.png?fit=max\&auto=format\&n=bP_M3iNvkCNJWoX1\&q=85\&s=de01f5b9a4c58c0d56734300830d6141)

**4. Select application scripts (optional)**

In **Applications and scripts**, select a script to run after OS installation. Scripts automate post-installation setup. Select **Without script** to skip this step.

**5. Set a VM password**

Enter a new server password or click **Generate** to create one automatically.

> [!NOTE]
>
> The previous password becomes invalid after reinstallation. To keep the current password, enter it in the password field before clicking **Reinstall**.

**6. Reinstall**

Click **Reinstall**. The reinstallation may take several minutes. When the server status returns to **Active**, the new operating system is ready.