title: How to use command "at" in shell to call zenity in ubuntu
body: <p>I am trying to write a shell script to remind an user. I want to show dialog at a specific time.</p>
  
  <p>I use zenity to show the dialog message</p>
  
  <p>Here is my script</p>
  
  <pre><code>#!bin/bash
  PATH=/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin:~/bin
  export PATH
  at now &lt;&lt;EOF
  /bin/zenity --info --text="hello word"
  EOF
  </code></pre>
  
  <p>But it doesn't show anything </p>
  
  <p>Please help me.</p>