Installing a Minecraft Server on Ubuntu
Setting up a Minecraft server on Ubuntu 12.04 is a fairly easy task on the command line. When choosing your server, be sure that it has (at a minimum)512MB of RAM, preferably at least 1GB.
The first thing you need to do is to connect to your server through SSH. If you are on a mac, you can open up Terminal, or if you are on a PC, you can connect with PuTTY. Once the command line is opened, login by typing:ssh username@ipaddressEnter the password when prompted. Although you can set up the server on the root user, it is not as secure as setting it up under another username.
Step One—Install the RequirementsBefore going further, we should run a quick update on apt-get, the program through which we will download all of the server requirements.sudo apt-get updateAfter that, we need to be sure that Java is installed on our server. You can check by typing this command:java -versionIf you don’t have Java installed, you will get a message that says "java: command not found". You can, then, download java through apt-get:sudo apt-get install default-jdk
You also need to supply your server with Screen which will keep your server running if you drop the connection:sudo apt-get install screenThere is a complete guide on how to install and use screen here.
Install the Minecraft ServerStart off by creating a new directory where you will store the Minecraft files:mkdir minecraftOnce the directory is created, switch into it:cd minecraftWithin that directory, download the Minecraft server software:wget https://s3.amazonaws.com/MinecraftDownload/launcher/minecraft_server.jarSince we have installed screen, you can start it running (-S sets the sessions title):screen -S "Minecraft server"After the file downloads, you can run it with Java:java -Xmx1024M -Xms1024M -jar minecraft_server.jar noguiThe launching text should look something like this:2012-08-06 21:12:52 [INFO] Loading properties 2012-08-06 21:12:52 [WARNING] server.properties does not exist 2012-08-06 21:12:52 [INFO] Generating new properties file 2012-08-06 21:12:52 [INFO] Default game type: SURVIVAL 2012-08-06 21:12:52 [INFO] Generating keypair 2012-08-06 21:12:53 [INFO] Starting Minecraft server on *:25565 2012-08-06 21:12:53 [WARNING] Failed to load operators list: java.io.FileNotFoundException: ./ops.txt (No such file or directory) 2012-08-06 21:12:53 [WARNING] Failed to load white-list: java.io.FileNotFoundException: ./white-list.txt (No such file or directory) 2012-08-06 21:12:53 [INFO] Preparing level "world" 2012-08-06 21:12:53 [INFO] Preparing start region for level 0 2012-08-06 21:12:54 [INFO] Preparing spawn area: 4% 2012-08-06 21:12:55 [INFO] Preparing spawn area: 12% 2012-08-06 21:12:56 [INFO] Preparing spawn area: 20% 2012-08-06 21:12:57 [INFO] Preparing spawn area: 24% 2012-08-06 21:12:58 [INFO] Preparing spawn area: 32% 2012-08-06 21:12:59 [INFO] Preparing spawn area: 36% 2012-08-06 21:13:00 [INFO] Preparing spawn area: 44% 2012-08-06 21:13:01 [INFO] Preparing spawn area: 48% 2012-08-06 21:13:02 [INFO] Preparing spawn area: 52% 2012-08-06 21:13:03 [INFO] Preparing spawn area: 61% 2012-08-06 21:13:04 [INFO] Preparing spawn area: 69% 2012-08-06 21:13:05 [INFO] Preparing spawn area: 77% 2012-08-06 21:13:06 [INFO] Preparing spawn area: 85% 2012-08-06 21:13:07 [INFO] Preparing spawn area: 93% 2012-08-06 21:13:08 [INFO] Done (15.509s)! For help, type "help" or "?"Your Minecraft server is now all set up.
You can exit out of screen by pressing
ctl-a dTo reattach screen, typescreen -RYou can change the settings of your server by opening up the server properties file:nano ~/minecraft/server.properties
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