title: Use sed with special character
body: <p>I try to use sed with special character:</p>
  
  <pre><code>sed -i -e "1i$jtempo" $file
  </code></pre>
  
  <p>$file is my file.
  $jtempo is my variable with special character like: " or [ or (</p>
  
  <p>But, when I run this script, I have this error: </p>
  
  <pre><code>sed: -e expression #1, char 17: unknown command: `"'
  </code></pre>
  
  <p>My file:</p>
  
  <pre><code>"desc_test":[
  "id",
  "name",
  ],
  </code></pre>
  
  <p>In my script bash:</p>
  
  <pre><code>jtempo=`cat myfile`
  </code></pre>
  
  <p>An idea ?
  Thanks you !</p>