title: Reserved Process ID
body: <p>As per my knowledge <code>Process ID 1</code> is reserved for <code>init</code>.</p>
  
  <p>What does process id 2 indicate? why no softlink to the binary executable for this process ID.</p>
  
  <pre><code>sudo ls -l /proc/1/exe    
  lrwxrwxrwx 1 root root 0 Apr 24 14:53 /proc/1/exe --&gt; /sbin/init  
  </code></pre>
  
  <p>But for /proc/2/exe</p>
  
  <pre><code>ls : cannot read symbolic link /proc/2/exe: No such file or directory
  lrwxrwxrwx 1 root root 0 Apr 24 14:53 /proc/2/exe
  </code></pre>
  
  <p>Im using Ubuntu 12.04.</p>
  
  <p>pls share your knowledge.</p>