title: Replace Strings Using Sed And Regex
body: <p>I'm trying to uncomment file content using sed but with regex (for example: [0-9]{1,5})</p>
  
  <pre><code># one two 12
  # three four 34
  # five six 56
  </code></pre>
  
  <p>The following is working:</p>
  
  <pre><code>sed -e 's/# one two 12/one two 12/g' /file
  </code></pre>
  
  <p>However, what I would like is to use regex pattern to replace all matches without entering numbers but keep the numbers in the result.</p>