title: Change a HDFS file create date from UNIX
body: <p>I wish to use something like the touch command in UNIX to change a file's last modification date.
  touch -d 20120101 </p>
  
  <p>The equivalent touchz command for hdfs does not support this.
  hadoop fs -touchz -d 20120101 </p>
  
  <p>Is there any way to change the last modified date of a file in Hadoop using UNIX or anything else?</p>