Project Zomboid Server Won't Start – Java, SteamCMD, Ports

Quick answer: Read the log, SteamCMD validate, check Java, free port 16261, raise RAM.

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Frequently asked questions (FAQ)

Zomboid starts then dies?

Console/panel log: often Java, missing files after SteamCMD, or port 16261 in use. Validate app_update, free the port.

Out of memory?

Upgrade RAM, keep -Xmx below RAM minus 2 GB.

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