title: How to set 4 space tab in bash
body: <p>It look like <code>set tabstop=4</code> in VIM, but I don't know how to set it in <strong>bash</strong></p>
  
  <p>for example:</p>
  
  <pre><code>echo -e "1234567890\t321\n1\t2\n123\t1"
  </code></pre>
  
  <p>current output:</p>
  
  <pre><code>1234567890      321
  1       2
  123     1
  </code></pre>
  
  <p>I want output like this:</p>
  
  <pre><code>1234567890  321
  1   2
  123 1
  </code></pre>
  
  <p>It can be shown in anywhere, just like <code>cat somefile</code> or <code>php -r 'echo "\t123";'</code></p>
  
  <p>How can I set tab width in bash?</p>