title: creating a blank line after some specific line using bash / linux
body: <p>I need to add an additional blank line after the line 45 using sed</p>
  
  <p>for example:</p>
  
  <pre><code>44 some text one
  45 some text two
  46 some text three
  47 some text four
  </code></pre>
  
  <p>result:</p>
  
  <pre><code>44 some text one
  45 some text two
  46 
  47 some text three
  48 some text four
  </code></pre>
  
  <p>I've tried to use </p>
  
  <pre><code>sed '45G' myfile.txt
  </code></pre>
  
  <p>but not seems to be working, it does prints content of the file on the screen but do not adds any space after the line 45</p>
  
  <p>Using CentOS 7 minimal</p>