title: How do I combine two files containing simple lists?
body: <p>For Google Chrome browser, I'm using an extension called NotScripts which allows you to only enable javascript for sites you put on the whitelist (and the opposite using blacklists). Since there's no cloud account for merging several instances of NotScripts across my platforms, I have to do this manually.</p>
  
  <p>Thus, I have copied and pasted the whitelist from one instance of NotScripts on OSX Google Chrome into a text file called whitelist-a.txt and the other instance of NotScripts from Windows Google Chrome into a text file called whitelist-b.txt.</p>
  
  <p>whitelist-a.txt -</p>
  
  <pre><code>10.0.0.1
  192.168.1.1
  192.168.100.1
  instagr.am
  google.com.au
  mathiasbynens.be
  google.ca
  thisisphotography.ca
  cyberduck.ch
  google.com.co
  ideaware.co
  0to255.com
  20thingsilearned.com
  456bereastreet.com
  [...]
  </code></pre>
  
  <p>whitelist-b.txt -</p>
  
  <pre><code>10.0.0.1
  192.168.1.1
  instagr.am
  marblerun.at
  google.com.au
  thisisphotography.ca
  cyberduck.ch
  keithcakes.com.au
  yellowshoe.com.au
  mathiasbynens.be
  gorealty.biz
  monzilla.biz
  cbc.ca
  google.ca
  [...]
  </code></pre>
  
  <p>As you can see, there are some similarities between the two lists. I don't want to merge the lists so that <code>list a</code> overwrites <code>list b</code>, but i want the two lists to become one, such as the following:</p>
  
  <pre><code>10.0.0.1
  192.168.1.1
  192.168.100.1
  instagr.am
  marblerun.at
  google.com.au
  mathiasbynens.be
  google.ca
  thisisphotography.ca
  cyberduck.ch
  keithcakes.com.au
  yellowshoe.com.au
  goreality.biz
  monzilla.biz
  google.com.co
  google.ca
  ideaware.co
  cbc.ca
  0to255.com
  20thingsilearned.com
  456bereastreet.com
  [...]
  </code></pre>
  
  <p>Are there problems or scripts I can run to do this? I'm not well versed in line command and can't find any plugins or scripts to do this either.</p>