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

# Images

> Operating systems you can deploy, their login users, and where they're offered.

## Available Operating Systems

| OS | Versions | Login user | Connect with |
| - | - | - | - |
| Ubuntu | 22.04 LTS, 24.04 LTS, 26.04 LTS | `ubuntu` | [SSH](https://docs.arct.cloud/compute/virtual-machines/connect-ssh.md) |
| Debian | 12 (Bookworm), 13 (Trixie) | `debian` | [SSH](https://docs.arct.cloud/compute/virtual-machines/connect-ssh.md) |
| CentOS Stream | 9, 10 | `cloud-user` | [SSH](https://docs.arct.cloud/compute/virtual-machines/connect-ssh.md) |
| AlmaLinux | 9, 10 | `almalinux` | [SSH](https://docs.arct.cloud/compute/virtual-machines/connect-ssh.md) |
| Rocky Linux | 9, 10 | `rocky` | [SSH](https://docs.arct.cloud/compute/virtual-machines/connect-ssh.md) |
| Fedora | 43, 44 | `fedora` | [SSH](https://docs.arct.cloud/compute/virtual-machines/connect-ssh.md) |
| Windows Server | 2022 | `Administrator` | [RDP](https://docs.arct.cloud/compute/virtual-machines/connect-rdp.md) |

> [!NOTE]
>
> Availability differs per location and plan. **Create Server** shows the images offered for the location and plan you select.

## Choosing an Image

* On **Create Server**, pick the location and plan first; the OS list updates to match.
* Windows Server needs a plan with 2 or more vCPUs.
* Your server page's **How to connect** panel shows the exact username and port.

## Logging In

* **Linux:** sign in as the login user above, then use `sudo` for admin tasks.
  * With an SSH key, sign in with that key.
  * Without one, the password is in your deploy email.
* **Windows:** sign in as `Administrator` with the password from your deploy email.

## Changing the OS

Go to your server's **Settings** tab, then **Danger Zone** → **Reinstall Operating System**. Reinstalling erases the disk and installs the image you choose. The images offered are the ones available for the server's location and plan.

## API

To list images and their IDs, see [Images in the API Reference](https://docs.arct.cloud/api-reference/images.md).


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