Tutorials/Minecraft help FAQ

General Information
Before anyone can help you in the IRC channel, please make sure that the following has been performed so that we can eliminate these as possibilities. You would be surprised how many problems these simple suggestions fix.
 * Make sure you machine meets the specifications in this forum post.
 * Make sure you are running the latest version of Java. On Linux, OpenJDK works as well.
 * If you are experiencing weird behavior and are using the most recent Java, try Reinstalling Minecraft (see below)
 * Some graphical issues may be related to old or outdated graphical drivers, make sure these are up to date
 * Make sure that your OS in general is up to date.
 * Windows: Windows Update
 * Mac OSX: Software Update
 * Ubuntu or other Debian based Linux distributions: sudo apt-get update;sudo apt-get upgrade
 * RedHat and CentOS: yum update (I think)

If you still have issues after this point, and none of the basic answers below can solve your problem, the make sure you do the following:
 * If the game is crashing, copy and paste the crash log into Pastebin and copy the link into the channel with a description of your problem.
 * Please be patient, the people the help in this channel are volunteering their expertise. Also all help in the channel is considered "best effort"

Basic Answers
The following answers are provided in order to eliminate many of the basic questions that come into the channel. If you have questions beyond what is offered here, feel free to ask.

Reinstalling Minecraft
One of the common ways to fix an ailing Minecraft installation of various bugs is to simply re-install it. Removing the launcher itself (the file you downloaded) however will not remove Minecraft. The steps below should work for most people.

Windows

 * 1) Navigate to your Application Data Folder
 * 2) * On Windows XP and Vista: C:\Documents and Settings\\Application Data\Roaming
 * 3) * On Windows 7 C:\Users\\AppData\Roaming
 * 4) Double Click the .minecraft folder
 * 5) Copy out the saves folder to a different location
 * 6) Go back one directory (to where you can see .minecraft)
 * 7) Drag the .minecraft folder into the trash
 * 8) Start the Minecraft.exe file to re-download Minecraft
 * 9) Close Minecraft when you reach the title screen
 * 10) Copy the saves folder back into the new .minecraft folder.  You can safely overwrite any data that's currently in this folder

Linux

 * 1) Open a terminal
 * 2) Copy and Paste the following into the terminal to delete the current minecraft installation and retain the current saved worlds: mv ~/.minecraft/saves /tmp/mc-save-tmp;rm -rf ~/.minecraft/*;mv /tmp/mc-save-tmp ~/.minecraft
 * 3) Start Minecraft like you normally would.  Your saves should be intact and the Minecraft client will re-download itself for you.

Mac OSX

 * 1) Open a Finder window
 * 2) Click the Go Menu item and Click Go to Folder
 * 3) Type ~/Library/Application Support/minecraft into the text field and click Go
 * 4) Drag the saves folder to your desktop
 * 5) Drag everything else in the minecraft folder to the trash
 * 6) Drag the saves folder back into the minecraft folder
 * 7) Close the Finder window and launch the Minecraft App just like you would normally.

Installing a Server on Windows
Go here

Installing a Server on Linux
Basic information is here. If you want to automatically handle installing and updating, the script below will install the hey0 server mod, which in turn will run the Minecraft server. This script is debian-specific, however can be modified for CentOS or RHEL.

Installing Client on Ubuntu Linux
Download this script and run the following commands in a terminal: chmod 755 ~/Downloads/minecraft_installer.sh sudo ~/Downloads/minecraft_installer.sh --install-client

Syncing Your Single Player Worlds Across Multiple Machines
All of your single-player worlds for Alpha is stored in the saves folder within .minecraft. The folders are World1, World2, World3, etc. There are several ways you can backup/archive or copy worlds across different machines.

Manual Syncing
If you want to simply manually back them up for later use, you can either copy out the whole saves folder, or just the world folder that  you want to backup. If you want to move the order to the worlds in the saved menu, just change the number at the end of the world folder name  to adjust the order as you would like.

Automatic Syncing via Dropbox
If you want all world saves to automatically synced and backed up across multiple systems (and revision controlled), The easiest way to do this would be to use Dropbox. First thing you need to do is sign up for an account on Dropbox.com and download the client on all of your systems.

Linking Minecraft to Dropbox on Linux
This process will link the saves folder for minecraft into Dropbox for Linux. We will be assuming that you have setup Dropbox to use the default folder (HOME/Dropbox) for your client.


 * 1) Close Minecraft
 * 2) Open a terminal
 * 3) Copy and paste the following into your terminal: mv ~/.minecraft/saves ~/Dropbox/Minecraft;ln -s $HOME/Dropbox/Minecraft $HOME/.minecraft/saves
 * 4) Close the terminal

Linking Minecraft to Dropbox on Mac OSX
This process will link the saves folder for minecraft into Dropbox for Mac OSX. For you Mac users, I'm sorry there isn't a more "Mac-Friendly" way of handling this, however we are taking advantage of some of the UNIX underpinnings of the OS. We will be assuming that you have setup Dropbox to use the default folder (HOME/Dropbox) for your client.
 * 1) Close Minecraft
 * 2) Open a terminal
 * 3) Copy and paste the following into your terminal: mv ~/Library/"Application Support"/minecraft/saves ~/Dropbox/Minecraft;ln -s $HOME/Dropbox/Minecraft $HOME/Library/"Application Support"/minecraft/saves
 * 4) Close the terminal

Linking Minecraft to Dropbox on Windows 7 & Vista
This process will link the saves folder for minecraft into Dropbox for Windows 7 and Vista. We will be using the Windows equivalents of Symlinks for Linux so we will need to get under the hood a little bit. Sorry that there isn't a simple "Run this EXE file" method :-p. We will be assuming that you have setup Dropbox to use the default folder (HOME/Dropbox) for your client. (Replace "Your PC Username" with the username of the PC you are currently logged on as.)
 * 1) Close Minecraft
 * 2) Open a new Explorer window
 * 3) Go to C:\Users\"Your PC Username"\AppData\Roaming\.minecraft
 * 4) Open a second Explorer window with the My Dropbox folder open
 * 5) Move the saves Folder in the .minecraft window to the My Dropbox window
 * 6) Rename the saves Folder to Minecraft
 * 7) Close both windows
 * 8) Go to Start → Run and type CMD and hit enter
 * 9) Type the following: mklink /d  C:\Users\"Your PC Username"\AppData\Roaming\.minecraft\saves C:\Users\"Your PC Username"\Dropbox\Minecraft
 * 10) Close the Command Prompt and enjoy Minecraft on multiple PCs

Linking Minecraft to Dropbox on Windows XP & 2000
This process will link the saves folder for minecraft into  Dropbox for  Windows XP and 2000. We will be using the Windows equivalents of Symlinks for Linux so we will need to get under the hood a little bit. Sorry that there isn't a simple "Run this EXE file" method :-p. We will be assuming that you have setup Dropbox to use the default folder (HOME/Dropbox) for your client.
 * 1) Close Minecraft
 * 2) Download Junction from Microsoft's site and install it.
 * 3) Open a new Explorer window
 * 4) Go to C:\Documents and Settings\\AppData\Roaming\.minecraft
 * 5) Open a second Explorer window with the My Dropbox folder open
 * 6) Move the saves Folder in the .minecraft window to the My Dropbox window
 * 7) Rename the saves Folder to Minecraft
 * 8) Close both windows
 * 9) Go to Start → Run and enter CMD and hit return.
 * 10) Type the following: junction -d   %HOME%\AppData\Roaming\.minecraft\saves %HOME%\Documents\"My  Dropbox"\Minecraft
 * 11) Close the Command Prompt