title: Split two files
body: <p>I have combined two files in android, using this Linux command</p>
  
  <blockquote>
    <p>cat file1.png file2.zip > file3.png</p>
  </blockquote>
  
  <p>How can I split two files again?I just want the zip file to be retrieved separately.</p>
  
  <p>Is there any specific command?I've tried these  codes:</p>
  
  <blockquote>
    <p>unzip file3.png</p>
  </blockquote>
  
  <p>Replaced png with zip:</p>
  
  <blockquote>
    <p>unzip file3.zip</p>
  </blockquote>
  
  <p>but none of them work.
  The only application with which I can open the combination, is winrar on windows</p>
  
  <p>And also I tried several unzipping and  unraring apps on android but none of them work except RAR app by rarlab</p>
  
  <p>Is there any source for those apps I mentioned to unrar/unzip the file?</p>