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All you have to do is click make a server then when the green box shows up enter the map you want and there you got a server
A LAN server is started on a computer. By default, it is only the person that uses that computer who will have access to the server( unless its a dedicated server, but that is different). If that person wishes to make his/her server public, then he can allow other people to enter his/her server by writing in console the command sv_lan 0. Most likely you have tried to access a server that was only made so that the person who started it can play on it.
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You can't. Only the person with the server files on their computer can turn the specific server on.
you can go on any server to type your own message but you have to make sure that there is no speech bubble in the server you are goin to enter.
First, make sure you are both connected to the same internet. Then have one person enter a world and make sure that in the pause menu they set the server to on, then the other person can just hit join game in the main menu
Your own server, no unless you make other people pay to get on. Public Servers, depends on the person running the server.
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You can find a guide on how to make a secure server backup at the eHow website. Once on website, type "Backup a server" into the search field at the top of the page and press enter to bring up the guide.
You can make money by renting a dedicated server by renting to more than one person. You can also make money by selling to advertisers.
To run a Minecraft Server you will need to download the server software (See links below) and then enter the command... java -cp minecraft-server.jar com.mojang.minecraft.server.MinecraftServer ...into the Terminal. The Read Me file that comes with the Server download explains how to configure the server to your particular needs.
The person who has root access to the server. That means, they are the ones with permission to make any changes to any file on that server site.