title: simple clarification on chmod permissions - write-only vs read+write
body: <p>I have a simple question about chmod permissions. What is the difference between writing and read+write? Doesn’t writing assume that you are reading the file in order to write it? </p>
  
  <p>To test my theory, I created two files: </p>
  
  <ul>
  <li><p>test200.txt</p></li>
  <li><p>test600.txt</p></li>
  </ul>
  
  <p>I proceeded to set chmod 200 for test200.txt,</p>
  
  <p>and chmod 600 test600.txt.</p>
  
  <p>vim inserting a gibberish string, writing and quitting, and then 
  reading the two files with the more command worked perfectly in both instances.</p>
  
  <p>What am I missing out here? </p>
  
  <p>Thanks,
  Aaronson  </p>