# Default username of operating systems

### Default Usernames

<table data-full-width="false"><thead><tr><th width="256">OS</th><th width="242">Default User</th></tr></thead><tbody><tr><td>Ubuntu(20.04, 22.04)</td><td>ubuntu</td></tr><tr><td>Centos( 7, 8)</td><td>centos</td></tr><tr><td>Centos (9) </td><td>cloudlinux</td></tr><tr><td>AlmaLinux</td><td>almalinux</td></tr><tr><td>Debian</td><td>debian</td></tr><tr><td>Fedora ( 37, 38)</td><td>fedora</td></tr><tr><td>CloudLinux (7)</td><td>cloudlinux</td></tr><tr><td>Redhat(8.9, 9.4)</td><td>cloud-user</td></tr><tr><td>Rocky 9</td><td>rocky</td></tr><tr><td>Oracle Linux</td><td>cloud-user</td></tr><tr><td>Windows (2022)</td><td>Administrator</td></tr></tbody></table>

### Accessing Linux Instances

* SSH key-based: `ssh -i access_key username@PUBLIC_IP`
* Link to: [Access Linux Instance](https://docs.neevcloud.com/neevcloud-guide/troubleshoot/how-to-access-instances/access-linux-instance)
* Link to: [Access with Password Authentication](https://docs.neevcloud.com/neevcloud-products/computes/getting-started-launch-vms/launch-instance-using-the-password)

### Accessing Windows Instances

* Default user: `Administrator`
* Password: Set during instance creation
* Method: Remote Desktop Connection (`mstsc`) using the instance's Public IP
* Prerequisite: Ensure RDP port 3389 is allowed in your Security Group
* Link to: [Access Windows Instance](https://docs.neevcloud.com/neevcloud-guide/troubleshoot/how-to-access-instances/access-windows-instance)
* Link to: [Change RDP Port](https://docs.neevcloud.com/neevcloud-guide/troubleshoot/how-to-access-instances/change-the-rdp-port-and-access-the-windows-server)