Highly Performant & Scalable Ultima Online Server Emulator
https://www.modernuo.com
c-sharpcsharpcsharp-coredotnetdotnet-coreemulatorgplgplv3mmommo-enginemmorpgmmorpg-serveronlinerpgrunuoserverservuoultimaultima-onlineuo
3cb077a79e
Two stalls hit CI in one night with nothing bounding them but GitHub's 360-minute default: 1. A silently deadlocked test host (2h41m before manual cancel) — the code fix is on #2525; this PR adds the guardrails that make any recurrence cheap and self-diagnosing. 2. A dnf step stalled mid-download for 12+ then 30 minutes. Probing the EPEL mirror pool directly: the **first** mirror in the current US mirrorlist returns consistent HTTP 500, and sibling mirrors serve mismatched metadata generations, while Fedora's status page reads all-green (it only tracks central services, not the volunteer pool). ## Changes - **`timeout-minutes: 30` on both jobs.** Verified live: the cap killed a stalled job at exactly 30:02 instead of 6 hours. - **`dotnet test --blame-hang-timeout 10m --blame-hang-dump-type full`** — a stuck test host is killed after 10 minutes and vstest names the in-flight tests with a full process dump; `TestResults` (including dumps) upload as artifacts on failure. A future hang produces a stack trace instead of a bill. - **EPEL setup follows the quickstart ordering**: `dnf-plugins-core` → enable CRB → `epel-release`. `epel-next` is no longer installed — none of the prerequisites need it (validated green on Stream 9), EPEL 10 doesn't have it, and it's one more mirrorlist to fetch. - **Matrix**: adds **Ubuntu 26.04 LTS**, **CentOS Stream 10**, and **AlmaLinux 10** (real-EL10 coverage); bumps **Fedora 42 → 44** (42 went EOL in May). README badges and the Linux prerequisites section updated to match. Kept deliberately simple per review: no retry wrappers around dnf — mirror hiccups are rare and the job cap bounds the damage. |
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ModernUO 
Ultima Online Server Emulator for the modern era!
Requirements
Supported Operating Systems
Required Frameworks
All Operating Systems
Windows
Development
Supported IDEs
Getting Started
- Install prerequisite requirements
- Clone this repository (or download the latest):
git clone https://github.com/modernuo/ModernUO.git
- Open
ModernUO.slnto start developing
Building/Publishing
Interactive Mode (Recommended for new users)
Run ./publish.cmd (Windows) or ./publish.sh (Linux/macOS) with no arguments to launch the guided build tool. It will:
- Check prerequisites (.NET SDK, native libraries)
- Walk you through configuration and platform selection
- Build and publish the server to the
Distributiondirectory - Show deployment instructions for cross-compiled builds
Command Line
./publish.cmd [release|debug] [os] [arch]
os- Supported operating systemsarchx64- Intel/AMD 64-bitarm64- ARM 64-bit
Linux Prerequisites
Fedora, CentOS, RHEL, AlmaLinux, Rocky, etc
dnf upgrade --refresh -y
# RHEL-family distributions (CentOS Stream, AlmaLinux, Rocky, RHEL) need CRB and EPEL enabled.
# Fedora skips this block.
dnf install -y dnf-plugins-core
dnf config-manager --set-enabled crb
dnf install -y epel-release
# Prerequisites
dnf install -y findutils libicu libdeflate-devel zstd libargon2-devel liburing-devel
Ubuntu, Debian, etc
apt-get update -y
apt-get install -y libicu-dev libdeflate-dev zstd libargon2-dev liburing-dev
OSX Requirements
brew install icu4c libdeflate zstd argon2
Running the Server
- Follow the publish instructions
- The
Distributiondirectory is portable — copy it to your production server for deployment - Run
ModernUO.exeordotnet ModernUO.dllfrom theDistributiondirectory - On first run, the server will prompt you to configure game data file locations
Troubleshooting / FAQ
- See FAQ
Want to sponsor?
Thank you for supporting us! You can find out how by visiting the sponsors page.
Collaborators
Thanks
- RunUO Team & Community
- Voxpire, the ServUO Team & Community
- Karasho, Jaedan and the ClassicUO Community
Development Tools & Plugins provided with ♥ by
Code Signing Policy
Free code signing provided by SignPath.io, certificate by SignPath Foundation.
This program will not transfer any information to other networked systems unless specifically requested by the user or the person installing or operating it
Teams & Roles
Approvers & Committers: Development Team