title: sed pattern command
body: <p>So I have this sed command applied on $1 wich is a file
  what I'd like to know is how sed evaluates all the slash, backslash
  succession and what does any character in the pattern mean</p>
  
  <pre><code>sed '/^\/\*/d/.*\*\//d' $1
  </code></pre>
  
  <p>as far as I know </p>
  
  <pre><code>'/^ ....../d' 
  </code></pre>
  
  <p>deletes some pattern at the begining of line (considering the second d)</p>
  
  <p>-what does the first d stand for, what about the dot and the / or /\ (unescape chars?)</p>
  
  <p>could please someone explain this to me please ?</p>