title: Use perl or awk to search for numbers in a file and increase them by constant amount from the command line
body: <p>I have a file that has a bunch of 3-digit numbers that I need to increase by a certain amount (actually, I need to increase all numbers that are greater than a certain value by a constant amount). How can I do this as simply as possible from the command line?</p>
  
  <p>EDIT: To clarify, there is more text in the file than just numbers, and it's not easy to extract them as fields in awk.</p>