Quick answer: Dedicated = SteamCMD 380870, start-server.sh, UDP 16261/16262, edit INI, test join.
steamcmd +force_install_dir /opt/zomboid +login anonymous +app_update 380870 validate +quit
./start-server.sh
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Frequently asked questions (FAQ)
SteamCMD app ID for Zomboid dedicated?
380870. Anonymous login, set force_install_dir, app_update 380870 validate.
How do I start it?
./start-server.sh in the install folder. First run creates servertest.ini; set an admin password.
Panel instead of SSH?
NexoraHost often has 1-click. Then just check ports and RAM.