Quick answer: Minecraft server won't start or players can't connect? In most cases it's missing Java 17+, EULA not accepted, closed port 25565 or wrong IP. This guide fixes exactly those issues step by step.
If you're here, you probably have one of these problems
- Server won't start – Java error, EULA not accepted or wrong JAR
- "Connection timed out" – port 25565 closed or firewall blocking
- Players can't find the server – wrong IP, no SRV record or DNS not propagated
- Server crashes immediately – not enough RAM or wrong Java version
Requirements
- Java 17+ – see Set up Linux VPS
- RAM – hardware guide
- Port 25565 open – Firewall & ports
Step 1: Install Java
sudo apt update
sudo apt install openjdk-17-jre-headless
java -versionStep 2: Download server JAR
mkdir minecraft-server && cd minecraft-server
wget https://piston-data.mojang.com/v1/objects/4506981865e518256b8607295ce6366ecb41f3f3/server.jarTip: Use Paper instead of Vanilla for less lag – performance guide.
Step 3: Accept EULA
java -Xmx2G -Xms1G -jar server.jar noguiEdit eula.txt → eula=true
Step 4: Start server
java -Xmx2G -Xms1G -jar server.jar noguiStep 5: Connect
Use server IP or domain. For domain without port: Minecraft SRV record.
Troubleshooting
| Symptom | Cause | Fix |
|---|---|---|
| Server won't start | EULA=false | Set eula=true |
| Connection timed out | Port closed | Open port 25565 |
| Server not found | DNS/SRV | SRV record |
| OutOfMemoryError | Low RAM | Hardware guide |
Related guides
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Frequently asked questions (FAQ)
Why won't my Minecraft server start?
Most common: EULA not accepted, Java too old (need 17+), wrong JAR or insufficient RAM. Check logs/latest.log.
Connection timed out – what to do?
Open port 25565 (TCP+UDP) in firewall and router. With domain: check SRV record and DNS propagation.