Heroku Fucking Console
Another example: finding help on hadoop:    [vagrant@localhost conf]$ hadoop --help
    Error: No command named `--help' was found. Perhaps you meant `hadoop -help'
    [vagrant@localhost conf]$ hadoop -help
    Error: No command named `-help' was found. Perhaps you meant `hadoop help'
    [vagrant@localhost conf]$ hadoop help
    Exception in thread "main" java.lang.NoClassDefFoundError: help
    Caused by: java.lang.ClassNotFoundException: help
      at java.net.URLClassLoader$1.run(URLClassLoader.java:217)
      at java.security.AccessController.doPrivileged(Native Method)
      at java.net.URLClassLoader.findClass(URLClassLoader.java:205)
      at java.lang.ClassLoader.loadClass(ClassLoader.java:321)
      at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:294)
      at java.lang.ClassLoader.loadClass(ClassLoader.java:266)
    Could not find the main class: help. Program will exit.