title: how to add a user to group , If user and group both have same name in linux?
body: <p>Here I have user and group with same name, while adding user(mqm) to the group(mqm) I am getting following problem. please give me solution.</p>
  
  <pre><code> [root@localhost /]# useradd -G mqm mqm
  
      useradd: user 'mqm' already exist
  </code></pre>