The world ends.
I believe the command is /start.
go to www.MC serverlist.net
download the server file from minecraft.net and when it is done downloading fill in all the notepad things and when your done with that start it and there
wrong bukkit version.
When you first start the server it will make a bunch of files, server.properties is one of them. Right click on it and select Open With.... and select WordPad or something simple.
You need to portforward
Funny you ask, it's about to be created! skype: mrazza292
if possible ,set your game mode to game mode1 and fly to a far corner of the server. there should be almost no one around . you can now start freely building on the server
It doesn't you just have to start it up and anyone can join.
Just run the java script. If your on windows start the minecraft_server.exe. These can be downloaded on the Minecraft website. Check the MC Wiki for more detailed information.
*rolls eyes* You gotta be kidding me? Install apache and run it, start up Minecraft and run it. It really is that simple.
In singleplayer, when you start a new world, under the name of the world, there is a tab where you can enter a seed. If you are talking about a server, then edit the seed in the Server Properties file.