title: How to remove `^I` character in Linux?
body: <p>This looks a number of space(<code>20170628        ,</code>) but using <code>cat -A</code> it shows <code>^I</code> (<code>20170628^I,</code>).</p>
  
  <p>I tried <code>sed -i '/s/^I//g' xxx</code> and <code>sed -i '/s/\^I//g' xxx</code>, but neither works.</p>
  
  <p>How to delete this character ? Any help is appreciated.</p>