Quick answer: To install or reinstall the operating system on a dedicated server, open a support ticket with the OS and version you need. A reinstall erases all data on the server, so back up first. Common choices: Ubuntu, Debian, AlmaLinux/Rocky Linux and Windows Server; custom ISOs can be discussed via ticket.
Overview
The initial OS is installed during provisioning based on your order. Later you may want a clean reinstall, a different distribution, or a custom image. On dedicated hardware this is done by our engineers (or via IPMI if you have console access), so the request goes through a ticket.
Before you start
- A full backup of everything you need — a reinstall wipes all disks unless agreed otherwise.
- The exact OS and version you want (e.g. Ubuntu 24.04 LTS, Debian 12, AlmaLinux 9, Windows Server).
- Your preferred RAID layout — a reinstall is the moment to change it.
- Note on licensing: Windows Server and some panels require a license — mention it in the ticket.
Step-by-step guide
- Back up your data off the server.
- Open a ticket: server ID/IP, requested OS + version, desired disk/RAID layout, and any timing constraints.
- Confirm the data-loss warning when asked.
- Wait for completion — you will get new access credentials on the service page or in the ticket.
- Log in, change the password, and run your base hardening/setup.
Common issues
- Forgot to back up something? After a reinstall data recovery is generally not possible — always double-check before confirming.
- Need an OS we don't list? Ask — custom ISO installs are often possible via IPMI/virtual media.
- Old SSH key warning? After reinstall the host key changes — remove the old entry:
ssh-keygen -R YOUR_SERVER_IP
When to contact support
All dedicated OS installs/reinstalls go through support. Also open a ticket if you want rescue mode instead of a full reinstall — sometimes a broken system can be repaired without wiping data.
Frequently asked questions
Does a reinstall delete my data?
Yes — an OS reinstall wipes all disks on the server unless explicitly agreed otherwise. Always back up everything you need off the server before confirming the request.
Which operating systems can I choose?
Common choices are Ubuntu, Debian, AlmaLinux, Rocky Linux and Windows Server. Custom ISO installations are often possible as well — discuss your case in the ticket.
Can I change the RAID level during a reinstall?
Yes — a reinstall is exactly the right moment to change the disk and RAID layout. State the desired layout in the ticket together with the OS you want installed.
Related articles
- How to access your dedicated server
- How to set up RAID on a dedicated server
- How to request hardware diagnostics
- How to contact Cloud2Y support
Need a hand? Contact Cloud2Y support →
