Edit in JSFiddle

.container .row .col-sm-4 h1{
  background: #2c3e50;
  padding: 100px;
  border-radius: 5px;
}
.container .row .col-sm-8 h1{
  background:#2c3e50;
  padding: 120px;
  border-radius: 5px;
}
.container .jumbotron{
  background: #2c3e50;
}
<!DOCTYPE html>
<html lang="ar" dir="rtl">
  <head>
    <meta charset="utf-8">
    <title> gnu linux algeria </title>
    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" >
  </head>
  <body>
<style>


body{
  box-sizing: border-box;
  background: #34495e;
  color: #ffffff;
  padding: 25px 0;
}

</style>
    <div class="container">
        <div class="jumbotron">
          <h3 class="text-center">  صفحة مشكلة من عمودين مختلفين  </h3>
        </div>

        <div class="row">
         <div class="col-sm-4"> <h1 class="text-center">  العمود الأول  </h1> </div>
         <div class="col-sm-8"> <h1 class="text-center">  العمود الثاني   </h1> </div>
        </div>
    </div>



<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
  <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js">
  </script>
  </body>
</html>