Apache spark 安装火花的问题

Apache spark 安装火花的问题,apache-spark,Apache Spark,我试图在虚拟机上安装Ubuntu 12.04上的Spark 我在办公室里按照指示做了 我有java版本“1.6.0_38”和scala版本“2.9.1” 我下载了spark并将其移动到位置/usr/local/spark 在尝试启动spark shell时，我得到以下错误： arj@arj-VirtualBox:/usr/local/spark/bin$ ./spark-shell Exception in thread "main" java.lang.NoClassDefFound

arj@arj-VirtualBox:/usr/local/spark/bin$ ./spark-shell 
    Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/spark/launcher/Main
    Caused by: java.lang.ClassNotFoundException: org.apache.spark.launcher.Main
        at java.net.URLClassLoader$1.run(URLClassLoader.java:217)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:205)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:323)
        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:294)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:268)
    Could not find the main class: org.apache.spark.launcher.Main. Program will exit.