title: How to select section in regular expression in linux commands
body: <p>I have these lines that every line begin a word then equal and several sentence so I like select every section. For example:</p>
  
  <pre><code>      delete = \account
            user\
            admin
             admin right is good.
        add = \
            nothing
            no out
            input output is not good 
        edit = permission 
            bob
            admin
            alice killed bob!!!
  </code></pre>
  
  <p>I want to select a section for example:</p>
  
  <pre><code>  add = \
        nothing
        no out
        input output is not good 
  </code></pre>
  
  <p>I like do it with regular expression.</p>