title: How to add left scroll bar using bootstrap?
body: <p>I am a newbie with bootstrap. I used SB-Admin to create an admin where I added navigations on the left menu as seen below. However, my problem is when the navigations (links are so many), I cannot display those at the bottom.</p>
  
  <p>May I ask how to add a scroll bar automatically when the navigation list exceeded with the length of the screen? </p>
  
  <p>Thanks in advance!</p>
  
  <p><a href="https://i.stack.imgur.com/t27fS.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/t27fS.png" alt="enter image description here"></a></p>