title: What are the differences among grep, awk & sed?
body: <blockquote>
    <p><strong>Possible Duplicate:</strong><br>
    <a href="https://stackoverflow.com/questions/366980/what-are-the-differences-between-perl-python-awk-and-sed">What are the differences between Perl, Python, AWK and sed?</a><br>
    <a href="https://stackoverflow.com/questions/1632113/what-is-the-difference-between-sed-and-awk">What is the difference between sed and awk?</a>  </p>
  </blockquote>
  
  
  
  <p>Maybe not a very specific question, but I am confused about the differences between <code>grep</code>, <code>awk</code> and <code>sed</code> in terms of their role in Unix/Linux system administration and text processing. </p>