[Hadoop Wiki] Trivial Update of "Chukwa Quick Start" by andyk

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The following page has been changed by andyk:
http://wiki.apache.org/hadoop/Chukwa_Quick_Start

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   1. Edit the writer.hdfs.filesystem property to point to a real filesystem.
   1. If you are running hadoop, this should be the path to the namenode.
   1. If you are not running hadoop, you can just juse a local path, of the form file:///tmp/chukwa.
-  1. Copy conf/chukwa-env.sh-template to conf/chukwa-env.sh.  Set JAVA_HOME in file.
+  1. Copy conf/chukwa-env.sh-template to conf/chukwa-env.sh.  Set JAVA_HOME in file. (If this is a standalone Chukwa, also set HADOOP_HOME here).
   1. Download the Apache logging commons jar from http://commons.apache.org/downloads/download_logging.cgi
   1. Copy the 'commons-logging-X.Y.Z.jar' file to $HADOOP_HOME/src/contrib/chukwa/lib
   1. In the chukwa root directory, say ``bash bin/jettyCollector.sh''