Get latest file from directory

[#1]

i have a dir /automation_test/oozie/output/Bigdata_Counts/.i have multiple files in this dir.I want to read only latest file from this directory

[#2]

@chinni 

Please elaborate your question else the simplest way to get the latest file in Linux

$ ls -lrt /automation_test/oozie/output/Bigdata_Counts/

But I guess you want to do that programmatically?

[#3]

I want latest file from hdfs dir.I am using below programm,but it get me all files into dataframe.I want to filter latest file and read only latest file.I am using scala

val  fname=spark.read.csv("hdfs://ndwns001.ndw.leidos.com/automation_test/oozie/output/Bigdata_Counts/")