Tutorials/Server startup script

This is an example of possible Minecraft server startup and maintenance script for debian based distros.

Script

 * 1) ! /bin/sh
 * 2) /etc/init.d/minecraft

SERVICE='minecraft_server.jar' USERNAME="minecraft" MCPATH='/opt/Minecraft' BACKUPPATH='/mnt/remote.fileshare/minecraft.backups'
 * 1) Settings

mc_start { if ps ax | grep -v grep | grep $SERVICE > /dev/null then echo "Tried to start but $SERVICE was allready running!" else echo "$SERVICE was not running... starting." cd $MCPATH su - $USERNAME -c "cd $MCPATH && screen -dmS minecraft java -Xmx1024M -Xms1024M -jar minecraft_server.jar nogui" sleep 7 if ps ax | grep -v grep | grep $SERVICE > /dev/null then echo "$SERVICE is now running." else echo "Could not start $SERVICE." fi       fi } mc_stop { if ps ax | grep -v grep | grep $SERVICE > /dev/null then echo "$SERVICE is running... stopping." su - $USERNAME -c "screen -p 0 -S minecraft -X stuff \"say Performing backup... About to shutdown\"" su - $USERNAME -c "screen -p 0 -S minecraft -X stuff `echo '\015'`" su - $USERNAME -c "screen -p 0 -S minecraft -X stuff "save-all"" su - $USERNAME -c "screen -p 0 -S minecraft -X stuff `echo '\015'`" sleep 7 su - $USERNAME -c "screen -p 0 -S minecraft -X stuff "stop"" su - $USERNAME -c "screen -p 0 -S minecraft -X stuff `echo '\015'`" sleep 7 else echo "$SERVICE was not running." fi       if ps ax | grep -v grep | grep $SERVICE > /dev/null then echo "$SERVICE could not be shut down... still running." else echo "$SERVICE is shut down." fi }

mc_update { if ps ax | grep -v grep | grep $SERVICE > /dev/null then echo "$SERVICE is running! Will not start update." else MC_SERVER_URL=http://minecraft.net/`wget -q -O - http://www.minecraft.net/download.jsp | grep minecraft_server.jar\ | cut -d \" -f 2`   su - $USERNAME -c "cd $MCPATH && wget -q -O $MCPATH/minecraft_server.jar.update $MC_SERVER_URL"    if [ -f $MCPATH/minecraft_server.jar.update ]    then        su - $USERNAME -c "mv $MCPATH/minecraft_server.jar.update $MCPATH/minecraft_server.jar"        echo "Minecraft successfully updated."    else        echo "Minecraft update could not be downloaded."    fi fi

} mc_backup { if ps ax | grep -v grep | grep $SERVICE > /dev/null then echo "$SERVICE is running! Will not start update." else echo "Backing up minecraft data" if [ -d $BACKUPPATH/world_`date "+%m.%d.%Y"` ] then for i in 1 2 3 4 5 6 do               if [ -d $BACKUPPATH/world_`date "+%m.%d.%Y"`-$i ] then continue else su - $USERNAME -c "cd $MCPATH && cp -r world $BACKUPPATH/world_`date "+%m.%d.%Y"`-$i" break fi           done else su - $USERNAME -c "cd $MCPATH && cp -r world $BACKUPPATH/world_`date "+%m.%d.%Y"`" fi   echo "Backing up the minecraft server executable" if [ -f "$BACKUPPATH/minecraft_server_`date "+%m.%d.%Y"`.jar" ] then for i in 1 2 3 4 5 6 do               if [ -f "$BACKUPPATH/minecraft_server_`date "+%m.%d.%Y"`-$i.jar" ] then continue else su - $USERNAME -c "cd $MCPATH && cp minecraft_server.jar "$BACKUPPATH/minecraft_server_`date "+%m.%d.%Y"`-$i.jar"" break fi           done else su - $USERNAME -c "cd $MCPATH && cp minecraft_server.jar "$BACKUPPATH/minecraft_server_`date "+%m.%d.%Y"`.jar"" fi fi    echo "Backup complete" } case "$1" in  start)    mc_start    ;;  stop) mc_stop ;; restart)    mc_stop    mc_start    ;;  update) mc_stop mc_backup mc_update mc_start ;; backup)    mc_stop    mc_backup    mc_start    ;; status) if ps ax | grep -v grep | grep $SERVICE > /dev/null then echo "$SERVICE is running." else echo "$SERVICE is not running." fi ;;
 * 1) Start-Stop here

*)   echo "Usage: /etc/init.d/minecraft {start|stop|update|backup|status|restart}"    exit 1    ;; esac

exit 0

Requirements

 * Debian based linux distro.


 * screen

Installation
Use your favorite editor to create file called minecraft in /etc/init.d/ and paste the script above in that file.

Edit the USERNAME and MCPATH -variables according to your setup.

Make sure the newly created file has required permissions You can set the permissions by running: chmod 755 /etc/init.d/minecraft

Then run update-rc.d minecraft defaults to add required symbolic links. Note: your system will most likely warn you that the script does not meet all requirements. The script will however work.

You can also setup an entry in your [crontab] to backup the server with: /etc/init.d/minecraft backup

Uninstall
update-rc.d -f minecraft remove

Usage
/etc/init.d/minecraft start stop, restart, backup or update