title: What is exactly meaning of commit command in git
body: <p>commit is </p>
  
  <blockquote>
    <p>A commit, or "revision", is an individual change to a file (or set of
    files). It's like when you save a file, except with Git, every time
    you save it creates a unique ID (a.k.a. the "SHA" or "hash") that
    allows you to keep record of what changes were made when and by who.
    Commits usually contain a commit message which is a brief description
    of what changes were made.</p>
  </blockquote>
  
  <p>but i didn't got it </p>
  
  <p>What is exactly meaning of <code>commit</code> in git and git hub?</p>
  
  <p><strong><em>NOTE</em></strong>:-This not dupli of any Q I am clear about <code>git push</code></p>