title: Grep: /proc/sysrq-trigger: Input/output error
body: <p>I am searching a file system and utilising grep. I see that everything is working until this error appears:</p>
  
  <pre><code>Grep: /proc/sysrq-trigger: Input/output error
  </code></pre>
  
  <p>I have found information in various places on the net where others have come accross the same problem, but nowhere really was there anything that worked. I tried 2>/dev/null which supressed the error but didn't 'skip the file' which is really what I hoped it would do. Instead it just stops the process (which is a find/sed process utilising grep).  I think there is a way to specify files for exclusion using grep, but I am hoping that there may be a more robust and elegant solution.</p>