title: Keeping a copy of a file in a same directory
body: <p>I am working on linux scripts , Assume that the directory is consisting of these following  scripts .</p>
  
  <pre><code>ls *.sh
  
  test.sh 
  MyScripts.sh 
  </code></pre>
  
  <p>My question is , before making any modifications to test.sh script , i want to keep a backup copy of it , so that if anything messes up , i will be not screwed up .
  please tell me how can i keep a copy of test.sh in the same directory ?? before making any modifications to the actual file test.sh .</p>
  
  <p>Thank you very much .</p>