Under multiplayer you will find this: Multiplayer Server
If you're running on Windows and just want to set up a server easily, download Minecraft_Server.exe (802 KB) and run it.
If you want to run the server on any other OS or without GUI it's a bit more involved (see this wiki article for a tutorial). First make sure you can use java from the command line. On Linux and Mac OS X this should already be set up but on Windows you might have to tinker with the PATH environment variable. Download and run minecraft_server.jar (621 KB) with java -Xmx1024M -Xms1024M -jar minecraft_server.jar nogui.
download the minecraft_server.jar file.
go to your server folder. delete the minecraft_server.jar file and replace with the one that you downloaded
I had the exact same problem as you when i downloaded the new update, but after you have done this, both the server and minecraft should run 1.3.1 Hope it worked for you! had the exact same problem
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go to http://www.minecraft.net/ and go to download
Under multiplayer you will find this:
Multiplayer Server
If you're running on Windows and just want to set up a server easily, download Minecraft_Server.exe (802 KB) and run it.
If you want to run the server on any other OS or without GUI it's a bit more involved (see this wiki article for a tutorial). First make sure you can use java from the command line. On Linux and Mac OS X this should already be set up but on Windows you might have to tinker with the PATH environment variable. Download and run minecraft_server.jar (621 KB) with java -Xmx1024M -Xms1024M -jar minecraft_server.jar nogui.
download the minecraft_server.jar file.
go to your server folder. delete the minecraft_server.jar file and replace with the one that you downloaded
I had the exact same problem as you when i downloaded the new update, but after you have done this, both the server and minecraft should run 1.3.1 Hope it worked for you! had the exact same problem