title: How to check for unuse images for your docker containers?
body: <p><a href="https://i.stack.imgur.com/6GxCk.png" rel="noreferrer"><img src="https://i.stack.imgur.com/6GxCk.png" alt="enter image description here"></a></p>
  
  <p>I have 3 containers, but I have a lot of images as you can see in the image.</p>
  
  <hr>
  
  <p>⚡️  <em>docker images</em></p>
  
  <pre><code>REPOSITORY                     TAG                 IMAGE ID            CREATED             SIZE
  sscportalsmb_smb-portal        latest              ad0854c799f6        12 days ago         17.6MB
  bheng_web                      latest              d5a0ea011c0a        2 weeks ago         182MB
  &lt;none&gt;                         &lt;none&gt;              957c22ababec        2 weeks ago         182MB
  docker_web                     latest              70b443ed0495        2 weeks ago         182MB
  bheng_app                      latest              509d58a68224        2 weeks ago         756MB
  docker_app                     latest              509d58a68224        2 weeks ago         756MB
  mysql                          5.6                 96dc914914f5        2 weeks ago         299MB
  sscportalapi_ssc-portal-api    latest              e8295f9cb5f1        4 weeks ago         160MB
  sscportaladmin_admin-portal    latest              fd141ceba4d6        4 weeks ago         17.7MB
  mysql                          latest              5fac85ee2c68        5 weeks ago         408MB
  redis                          latest              1fb7b6c8c0d0        6 weeks ago         107MB
  alpine                         3.6                 76da55c8019d        2 months ago        3.97MB
  keymetrics/pm2-docker-alpine   6                   4a09bfc067d6        4 months ago        75.3MB
  andrewmclagan/nginx-hhvm       latest              ec6cc741eb0e        7 months ago        580MB
  nginx                          1.10                0346349a1a64        7 months ago        182MB
  tutum/haproxy                  latest              33bc771bec1e        17 months ago       232MB
  php                            7.0.4-fpm           81d7a2fdc6dc        20 months ago       494MB
  </code></pre>
  
  <hr>
  
  <p>I am not sure if this is normal.</p>
  
  <p>How do I check for images that I don't use and get rid of them accordingly? </p>