Knowledge Base

How many OS do you offer? Are custom ISOs supported?

C-Servers offers multiple operating systems. There are slight technical differences between the OSes offered in VPS servers under 640MB of RAM, and VPS servers with more than 640MB of RAM, due to several system specifics and for the best optimization.

The full list for MultiVPS, which is separated between direct templates that you can use immediately with your VPS and preloaded ISO with netboot.xyz for a personalized install, is:

OS Templates

• AlmaLinux 9 Latest, 10 Latest and 10 (x86-64-v2);
• Alpine Linux 3.19;
• Arch Linux Latest Minimal ³;
• CentOS 7, 9 Stream and 10 Stream;
• Debian 10, 11, 12 and 13;
• Fedora 42 and 43;
• FreeBSD 15.0-RELEASE;
• OpenSuse Tumbleweed;
• Rocky Linux 8.10, 9 Latest and 10 Latest;
• Ubuntu 18.04, 20.04, 22.04 and 24.04 LTS, IPv4-only due to a Netplan/Cloud-init bug (more info)
• Windows Server 2019¹, 2022¹ and 2025¹.

Via Netboot.xyz

• ArchLinux ³
• Gentoo 
• Kali 
• Slackware 
• Tiny Core Linux ⁴
• ^{and many others available}

Via Pre-Available ISOs

• Debian 13.3;
• Ubuntu 22.04.6 LTS, Ubuntu 24.04.3 LTS;
• Windows 2025, 2016, 2012 R2, 2008 R2, 2008 x86;
• OpenBSD 7.8;
• NetBSD 10.1.

It's a huge variety of operating systems available to you. All OS templates were previously tested on a VPS to ensure them as fully operational.

¹ Customer needs to bring their own license or, after expiration, Microsoft will shutdown Windows every 60 minutes.
² Server Core is usable for plans with 2-4GB RAM and at least 30GB (ex: CentralVPS-2048). Server with Desktop Experience can only be used on 4GB or more of RAM (ex: ExtraVPS-4096). Not available on plans under 2GB RAM.
³ Arch Linux is provided only for Arch-dependent workloads - while working, it has shown slow disk performance when virtualized over KVM (around 10% of total performance, HDD-equivalent on an NVMe). Proceed with caution.
⁴ This operating system doesn't natively support cloud-init, which is essential for virtualization. It's still possible to use ISOs to deploy local packages. Proceed with caution.

What about the Custom ISOs on MultiVPS?

Custom ISOs can be used on any VPS package, as long as they are uploaded from the user. This functionality is accessible through the VirtPortal (virtportal.cfld.uk), where uploaded ISOs can be seen and booted from.

Ensure that the relevant packages for your VM are installed - if your system logs some errors, ensure you have cloudinit/v2 and qemu-guest-agent packages installed on your personalized VPS. 

(Last updated on 20/01/2026).