title: How can I insert a new line after each character in shell script?
body: <p>Assuming I have the following string:</p>
  
  <pre><code>abcdefghi
  </code></pre>
  
  <p>Which command can I use so that the outcome is:</p>
  
  <pre><code>a
  b
  c
  d
  e
  f
  g
  h
  i
  </code></pre>
  
  <p>I just started coding so I hope someone can help me.</p>