title: Perl regex to act on a file from the command line
body: <p>In a file, say xyz.txt i want to replace the pattern of any number followed by a dot example:1.,2.,10.,11. etc.. with a whitespace.
  How to compose a perl command on the command line to act on the file to do the above, what should be the regex to be used ?</p>
  
  <p>Please Help
  Thank You.</p>