title: How do I copy multiple files at once in linux? With the source and the destination locations of these files being the same directory
body: <p>I have some files located in one directory /home/john
  I want to copy all the files with *.text extension from this directory and save them as *.text.bkup, again in the same directory, i.e. /home/john</p>
  
  <p>Is there a single command with which I can do that?
  Also, with extension of the same idea, is it possible to copy all the files with multiple extentions (e.g. *.text &amp; *.doc) as *.text.bkup &amp; *.doc.bkup repectively (again in the same directory)?</p>