- Run multiple Minecraft worlds.
- Supports CraftBukkit in addition to the standard Mojang server distribution.
- Users automatically notified of important server events.
- Keep track of users logged into the world servers.
- Display a Message Of The Day to users logging into a world server.
- Start, stop, and restart single or multiple worlds.
- LSB-compatible init script, allows for seamless integration with your server's startup and shutdown sequences.
- Map worlds using the Minecraft Overviewer mapping software.
- Backup worlds, and remove backups older than X days.
- Update the server software and installed addons.
- Send commands to a world server from the command line.
Save the file as "minecraft_server", without the quotes.
February 28, 2013
- Fix the detection of required programs. Error messages should now display correctly if a program is found to be missing.
- Fix the permissions for the screen tty using Montoya's patch.
- Add the logrotate command to the script for rotating the log file using a modified version of Zanix's patch.
- Search the world folder for an overviewer-settings.py file for custom mapping settings for the world using Zanix's patch.
- Use the update infrastructure to manage the Minecraft client download using Zanix's patch.
- Catch banned players logging off of the server using Zanix's patch.
- Add support for Minecraft Overviewer and drop support for c10t and Pigmap.
- Remove support for mcsuperserver.py, it is buggy and does not have an update for Minecraft 1.4.
- Remove support for user and admin commands. They no longer work with Minecraft 1.4.
- Use Paul Andreassen's mcsuperserver.py to launch servers on demand as recommend by Culfri.
- Add support for the Pigmap mapping software.
- Added Zanix's backup patch.
- Add a more descriptive error for when the server fails to start.
- Fix an issue with wget not being able to download CraftBukkit at its current address (was breaking on the &).
- Once again update the CraftBukkit download location to point to their latest release.
- Add a separate variable for admin level user commands, but just give them access to the motd for now.
- Recognise admins attempting to run a command.
- Update the CraftBukkit download location to point to their latest stable build (fixes 1.0).
- Add an IP address field to the worlds.conf file, blank by default.
- Add the option to utilize a mirror image of a world for use in ramdisk configurations.
- Modify init info to include support for chkconfig.
- Add a lock file when running under RedHat/CentOS to fix shutdown issues (found by swallowtail23).
- Display a message prior to displaying a world's screen about how to exit that screen.
- Fix a bug in detecting the process ID of Screen when there are very similar world names (found by Tachdelan).
- Fix mapping of the Nether when using CraftBukkit.
- Update the CraftBukkit download location to point to their latest stable build (fixes beta 1.8).
- Simplify the server type selection code as suggest by hexparrot.
- Verify the download of c10t.
- Add /help and /motd user commands.
- Follow symbolic links when creating tar archives during a full backup.
- Make the auto restart on SEVERE server event optional.
- Simplify the Nether detection method, fixing the mapping of the Nether in 1.6.
- Print a message if running the script as the wrong user.
- Add current version detection for c10t download.
- Fix c10t download.
- Add support for CraftBukkit.
- Add an option to connect to the Screen holding the world's console.
- Restart the server when a SEVERE server event is caught.
- Fix mapping of Nether worlds with c10t.
- Allow spaces in addition to tabs in the worlds.conf file.
- Allow the script to run from a user account.
- Add the watch command line option to allow the server admin to watch the log file.
- Add options to route lib-notify output to the correct user and display.
- Make sure the server.log file exists prior to starting the log processor.
- Allow comments in the worlds.conf file.
- Be more verbose when doing updates to the server software.
- Add a Message of the Day (MOTD) that is whispered to users when they log on.
- Fix lib-notify output.
- Remove the time from backup files, instead use a counter for multiple backups in the same day. This should fix issues with file systems that don't like using a colon in the filename.
- Output the number of online users when the scripts status command is given.
- Fix 32/64 bit detection (used for updating c10t).
- Add initial log processing. Keep track of users logging in and out.
- Make the script use the same world names as Minecraft.
- Add error checking to calls to wget and screen.
- Add backup duration variable and logic. Backups older than X days are now removed when new backups are created.
- Directories are now created properly when maps are first created with c10t.
- Add send option, to send a command to the world server.
- Add an infrastructure for updating addons, and add c10t to the update routine.
- Add force-stop and force-restart options to kill a world server process after attempting a clean shutdown. This will allow admins to stop locked servers more easily.
To get your server to run the script on startup, and cleanly down the server on shutdown, you need to copy the script to /etc/init.d, set execute permissions on the file, and instruct the system to use the script on startup and shutdown. The following commands will work in Debian and Ubuntu like environments, ymmv in others.
sudo cp minecraft_server /etc/init.d/minecraft_server sudo chmod 755 /etc/init.d/minecraft_server sudo update-rc.d minecraft_server defaults
For security reasons, the script uses a user account named minecraft rather than root. As such, you need to create the user before using this script:
sudo adduser minecraft
If the Minecraft server software is not located when the server start command is issued, the software will be downloaded to the proper location: /home/minecraft/minecraft_server/minecraft_server.jar
I've made an attempt to utilize only features that are normally installed in most Linux and UNIX environments in this script, but there are a few requirements that this script has that may not already be in place:
- Java 6 JDK - The Minecraft server software requires this.
- Perl 5 - Most, if not all, Unix and Linux like systems have this preinstalled.
- GNU Screen - Allows the script to run the Java process as a background daemon and send commands to the server.
- GNU Wget - Allows the script to download software updates via the internet.
- rdiff-backup - Allows the script to efficiently run backups.
- Iptables - Although not explicitly required, a good firewall should be installed.
sudo apt-get install openjdk-6-jdk perl screen wget rdiff-backup iptables
The script now uses the Minecraft Overviewer mapping software to generate maps of your worlds. You can download premade binaries for supported systems (Debian/Ubuntu, CentOS/RHEL/Fedora), or build your own binary from source if needed.
The script can handle running multiple Minecraft world servers, just add each server to the /home/minecraft/worlds.conf file that will be generated on the first run. Do not include the IP address information if it is not needed.
Example worlds.conf file for two worlds named alpha and beta and the ports that they run on. This file will be generated if missing.
Note: The world name should not contain a space. Leave the ip address blank if it is not needed.
# Minecraft world configuration file # <world> <port> <ip> alpha 25565 beta 25566 gamma 25567 delta 25568 epsilon 25569
Firewall / NAT
If you have a firewall installed on your computer, or a router using NAT installed in your network, you will need to route some ports to your server. Instructions on how to accomplish this are beyond the scope of this post, but here are some things you will need to know:
- The default port for the Minecraft server is: 25565.
- If you wish to run multiple world servers using this script, you will want to open a range of ports (for example 25565 - 25575).
*filter :INPUT DROP [0:0] :FORWARD DROP [0:0] :OUTPUT DROP [0:0] # Handle loopback addresses -A INPUT -i lo -j ACCEPT -A OUTPUT -o lo -j ACCEPT # Allow outbound packets if state related, and inbound if established -A OUTPUT -m state --state NEW,ESTABLISHED,RELATED -j ACCEPT -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT # Drop stealth scans -A INPUT -i eth0 -p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -A INPUT -i eth0 -p tcp -m tcp --tcp-flags SYN,FIN SYN,FIN -A INPUT -i eth0 -p tcp -m tcp --tcp-flags SYN,RST SYN,RST -A INPUT -i eth0 -p tcp -m tcp --tcp-flags FIN,RST FIN,RST -A INPUT -i eth0 -p tcp -m tcp --tcp-flags ACK,FIN FIN -A INPUT -i eth0 -p tcp -m tcp --tcp-flags ACK,URG URG # Allow ICMP pings -A OUTPUT -p icmp -m state --state NEW,ESTABLISHED,RELATED -j ACCEPT -A INPUT -p icmp -m state --state ESTABLISHED,RELATED -j ACCEPT # Allow port 22 for SSH -A INPUT -m state --state NEW -m tcp -p tcp --dport 22 -j ACCEPT # Allow port 80 for HTTP -A INPUT -m state --state NEW -m tcp -p tcp --dport 80 -j ACCEPT # Allow port 443 for HTTPS -A INPUT -m state --state NEW -m tcp -p tcp --dport 443 -j ACCEPT # Allow ports 25565 - 25575 for Minecraft world servers -A INPUT -m state --state NEW -m tcp -p tcp --dport 25565:25575 -j ACCEPT COMMIT
All commands below assume that you are running them as either the minecraft user or as root (through sudo).
Note: If the script is run as the root user, all important server processes will be started using the minecraft user for security purposes.
su minecraft /etc/init.d/minecraft_server <option>or
sudo /etc/init.d/minecraft_server <option>
- start <world>
Start the Minecraft world server. Starts all world servers by default.
- stop <world>
Stop the Minecraft world server. Stops all world servers by default.
- force-stop <world>
Forcibly stop the Minecraft world server. Forcibly stops all world servers by default.
- restart <world>
Restart the Minecraft world server. Restarts all world servers by default.
- force-restart <world>
Forcibly restart the Minecraft world server. Forcibly restarts all world servers by default.
- status <world>
Display the status of the Minecraft world server. Displays the status of all world servers by default.
- send <world> <command>
Send a command to a Minecraft world server.
- logrotate <world>
Rotate the server.log file. Rotate the server.log file for all worlds by default.
- backup <world>
Backup the Minecraft world. Backup all worlds by default.
- screen <world>
Connect to the Screen holding the world's console. See more detailed notes below.
- watch <world>
Watch the log file for the Minecraft world server.
- map <world>
Run the Mincraft Overviewer mapping software on the Minecraft world. Maps all worlds by default.
- update <software package>
Update a software package. Update the server software and any addons by default.
- server - Minecraft server software.
- client - Minecraft client software, for mapping.
To start just the world named alpha, issue the command:
/etc/init.d/minecraft_server start alpha
To send a command to a world server, issue the command:
/etc/init.d/minecraft_server send <world> <command> ie. /etc/inid.d/minecraft_server send alpha say Hello world!
The screen option allows an admin to connect to and interact with the Screen holding the Minecraft world server's console. To exit out of this Screen requires the admin to hit Ctrl-A, followed by the letter d.
Message of the Day (MOTD)
To whisper the message of the day to users as they log into the world, add a file called motd.txt to the /home/minecraft directory.
To add colors to your Help or MOTD files, insert the following color codes into your text:
- §0 - black
- §1 - blue
- §2 - deep green
- §3 - aqua
- §4 - deep red
- §5 - purple
- §6 - gold
- §7 - gray
- §8 - dark gray
- §9 - light blue
- §a - green
- §b - teal
- §c - red
- §d - magenta
- §e - yellow
- §f - white
§fWelcome to Minecraft! §fToday's theme is §4red§f. §fLook out for those §2creepers§f!
To use the CraftBukkit server distribution instead of the default Mojang server, modify the following lines of code:
## Minecraft server options. # Choose only one server distribution, leave the other commented out. # Default Mojang server distribution. SERVER_URL="http://www.minecraft.net/download/minecraft_server.jar" SERVER_JAR="minecraft_server.jar" SERVER_ARGS="nogui" # CraftBukkit server distribution. # SERVER_URL="http://ci.bukkit.org/job/dev-CraftBukkit/promotion/latest/Recommended/artifact/target/craftbukkit-0.0.1-SNAPSHOT.jar" # SERVER_JAR="craftbukkit-0.0.1-SNAPSHOT.jar" # SERVER_ARGS=""
Bukkit plugins are world specific and are contained within the plugins directory of the world. ie.
If you would prefer to use the same plugins directory for all of your worlds, you can create symlinks for each world. ie.
mkdir /home/minecraft/plugins ln -s /home/minecraft/plugins /home/minecraft/worlds/alpha/plugins ln -s /home/minecraft/plugins /home/minecraft/worlds/beta/plugins
On systems that support lib notify, you can modify the script to print a message on your desktop of important server events.
First, you need to know the name of the display you want to route the messages to. This is usually ":0.0", but it may be something different on your system.
glxinfo | grep "name of display"
If your username is different than the user used for the Minecraft server, replace $USER_NAME in LIBNOTIFY_USER_NAME=$USER_NAME with the correct username.
Modify the following lines of code in the script.
## Lib-notify configuration # To use lib-notify to print a message on your desktop of important server events, change the following to a 1. USE_LIBNOTIFY=0 # The username and display that notifications will be routed to. LIBNOTIFY_USER_NAME=$USER_NAME LIBNOTIFY_DISPLAY=":0.0"
Consider this code to be in the public domain. If you have any recommendations or make some useful changes, post a reply in this thread to keep this script evolving.
I have only tested this code in a Debian/Ubuntu environment, but there is no reason that it shouldn't work in any appropriately configured UNIX-like environment, including Apple Mac OSX and the other BSD variants, with only minor modifications. If you experience errors running this script, please post a copy of the error message and a note detailing the operating environment where the error occurs, and I'll try to work out a solution with you.