df = sqlContext.read.format("com.databricks.spark.csv").option("header", "true").option("inferSchema","true").option("delimiter",",").load("file:///home/rxie/csv_out/wamp.csv")

ls -la /home/rxie/csv_out/wamp.csv
-rw-r--r-- 1 rxie linuxusers 2896878 Nov 12 14:59 /home/rxie/csv_out/wamp.csv