bootstrap center text vertically

1<div class=”row”>
2	<div class=”col-6 align-self-center”>
3    	<div class=”card card-block”>
4    		Center
5        </div>
6    </div>
7</div>

1<div class="jumbotron d-flex align-items-center min-vh-100">
2  <div class="container text-center">
3    I am centered vertically
4  </div>
5</div>
6

1<div class="my-auto">
2  ...inner divs and content...
3</div>

1<div class="container h-100">
2    <div class="row align-items-center h-100">
3        <div class="col-6 mx-auto">
4            <div class="jumbotron">
5                I'm vertically centered
6            </div>
7        </div>
8    </div>
9</div>
10