Editing Tutorials/Setting up a server (section)

=== Minecraft options ===
Options for the server JAR go ''after'' the {{code|-jar minecraft_server.jar}} part. Run with <code>--help</code> to see all available arguments that can be passed to the server. Below is a list of available commandline options for the server.

; <code>--bonusChest</code>
: If a [[bonus chest]] should be generated, when the world is first generated.
; <code>--demo</code>
: If the server is in demo mode. (Shows the players a demo pop-up, and players cannot break or place blocks or eat if the demo time has expired)
:Equivalent to playing ''Minecraft'' without a account, you have about 5 in-game days before your trial ends.
; <code>--eraseCache</code>
: Erases the lighting caches, etc. Same option as when optimizing single player worlds.
; <code>--forceUpgrade</code>
: Forces upgrade on all the chunks, such that the data version of all chunks matches the current server version (same as with sp worlds).
:This option significantly increases the time needed to start the server. 
; <code>--help</code>
: Shows this help.
; <code>--initSettings</code>
: Loads the settings from 'server.properties' and 'eula.txt', then quits.
; <code>--jfrprofile</code>
:Initializes the Java Flight Recorder on the server. Only available on 1.18+.
; <code>--nogui</code>
: Doesn't open the GUI when launching the server.
: You will still be able to interact with your server, but you must use the cmd or Terminal if enabled.
:* <code>nogui</code> does the same thing as this option for backward compatibility with very old versions of the server, but <code>--nogui</code> is preferable as it matches the format of other options
; <code>--safeMode</code>
: Loads level with vanilla datapack only.
; <code>--serverId <String></code>
: Gives an ID to the server. (??)
: Used only in crash reports. If not given, then the "Server Id" detail is not added to crash reports.
; <code>--singleplayer <String></code>
: Runs the server in singleplayer mode. <String> is the name of the Singleplayer player.
: The Singleplayer player data is loaded from <code>Player</code> in the <samp>level.dat</samp> file.
: Monsters spawn ignoring the 'spawn-monsters' property unless the [[difficulty]] is Peaceful. Animals spawn ignoring the 'spawn-animals' property.
: The default [[permission level]] is 0 (ignoring the 'op-permission-level' property) unless otherwise specified for a player in ops file.
: The permission level required for the {{cmd|/publish}} command is 4. Although the server is already published.
: The permission level required for the {{cmd|/seed}} command is 0, not 2.
: Blacklists are disabled. These commands are not available: {{cmd|/ban-ip}}, {{cmd|/banlist}}, {{cmd|/ban}}, {{cmd|/pardon}}, {{cmd|/pardon-ip}}.
: The local IP is '127.0.0.1' ignoring the 'server-ip' property. Use of authentication is disabled ignoring the 'online-mode' property. Prevention of proxy connections is disabled ignoring the 'prevent-proxy-connections' property.
: The default game mode (the 'gamemode' property) is still used for new players, but does not change the world's default game mode (<code>GameType</code> in the <samp>level.dat</samp> file).
; <code>--universe <String></code>
: The folder in which to look for world folders. (default: {{code|.}}, the current directory)

The following options are available from [[server.properties]] too. It might be a better idea to edit that file instead for easier management:
; <code>--world <String></code>
: The name of the world folder in which the level.dat resides. (default: {{code|world}})
: This is the same as {{code|level-name}}.
; <code>--port <Integer></code>
: Which port to listen on, overrides the server.properties value. (default: -1, read from server.properties)
:See [[Server.properties]], option "server-port", for restrictions on this value.