Windows Server to Linux migration · for small & mid-sized business
Every Windows Server needs at least 16 core licences plus a CAL for each user, bought again at every upgrade. File, web and many application servers have no technical reason to stay. We move them to Debian or Ubuntu on a fixed price and date — and leave alone what genuinely needs Windows.
Why now
Sources: Microsoft Windows Server 2025 pricing, Microsoft Lifecycle (Windows Server 2016), Debian and Ubuntu licensing.
Savings calculator
Enter what you run today. The calculator applies the vendor's real licensing rules — core minimums included — and compares three years.
Exchange rate used: 1 € = US$ (ECB reference rate, Sep 2026). Everything is calculated in your browser — nothing you enter is sent anywhere.
How we move it
Shares, NTFS permissions and AD groups carried over; users keep the same drive letters and paths.
Linux servers join your existing domain; logins, groups and Kerberos keep working.
Sites, certificates and reverse-proxy rules moved. .NET applications only where they run on modern .NET on Linux.
Print, DHCP and similar roles move to their Linux equivalents where that simplifies things — or stay on a domain controller.
Every moved server is monitored, backed up and patched from the first day — by your team, by us or by StayPatched.
The Windows server stays powered off, not deleted, until you sign off.
Straight talk
How a migration runs
Inventory, written plan, fixed quote and date — before any work starts.
Non-critical systems move first; performance and restores proven on your workloads.
A runbook per wave, agreed windows, a written way back for every step.
Wave by wave, outside your business hours. Anything wrong rolls back.
Documentation, runbooks, full admin access — or StayPatched keeps it patched.
Questions
For file shares, usually not: the same paths and the same permissions. Each server switches in its own off-hours window.
Yes. They join the existing domain; logins, groups and file permissions keep working.
Modern .NET (.NET 5 and later) runs on Linux; the older .NET Framework doesn't. The assessment checks every application.
Not for services that moved to Linux. Whatever still runs on Windows Server — including Windows Active Directory — still needs CALs.
It depends on the number of servers and applications. The completion date is fixed in the quote after the assessment.
Get a migration plan
A short call, then a written assessment: what moves as-is, what needs care, what should stay — with a fixed price and a fixed date. No obligation.