You can connect to a Linux-based VPS using SSH (Secure Shell), which provides secure command-line access to your server without the need for a graphical interface.
Note: Most QuantVPS services are provisioned with Windows Server 2022 by default. However, you can reinstall between operating systems (e.g., switching from Windows to Ubuntu or vice versa) at any time from your user dashboard by navigating to Control Panel → Reinstall Operating System and selecting the relevant OS. Please note that this is a fresh installation — all existing data will be erased unless you back up your files and manually restore them after the reinstall.
This article is intended for QuantVPS users running Ubuntu 20.04, 22.04, or 24.04. It does not apply to VPS instances running Windows Server.
This method is commonly used by developers and advanced users who are managing Linux-based servers, running API services, or performing remote automation — and do not require the graphical interface that Windows typically provides.
Windows Option 1: Using Command Prompt or PowerShell
Open Command Prompt or PowerShell
Run the following command (replace with your server's IP address):
ssh root@your.server.ip.address
If this is the first time you're connecting to this server, you'll see a message saying the authenticity of the host can't be established, asking if you want to continue connecting. This is expected — type yes and press Enter to continue.
When prompted, enter your password
Not working? Even if your QuantVPS dashboard displays the default username as Administrator, that applies only to Windows-based servers. For Ubuntu/Linux servers, your SSH username is: "root"
Windows Option 2: Using PuTTY (Graphical Interface)
Download and install PuTTY
Open PuTTY and enter your server IP in the "Host Name" field
Set Port to 22 and connection type to SSH
Click Open
When prompted, login as: root
Enter your password
On macOS or Linux:
Open Terminal
Run the following command:
ssh root@your.server.ip.address
If it's your first time connecting, you may see the same host authenticity prompt described above — type yes to continue.
Type your password when prompted
Recommended: Use SSH Key Authentication
Instead of logging in with the root password, we recommend setting up SSH key authentication where possible. SSH keys are significantly more secure than passwords — they're effectively immune to brute-force login attempts, since there's no password for an attacker to guess.
Need Assistance?
Our support team is available 24/7. If you have any questions or run into issues, open a support ticket from your QuantVPS dashboard and we'll get back to you as quickly as possible.