title: Remove sudo permissions for one command
body: <p>this is probably a really simple question. I apologize if it is a duplicate.
  I want to know how to remove sudo permissions for one particular command. I've created a script that installs a bunch of .deb packages and it needs sudo to do that, but one command in it needs to run without sudo permissions, so how would I do that? I'm using Ubuntu and this is a bash script.</p>
  
  <p>I'm calling my script: ROS_install</p>
  
  <p>Here is part of the script:</p>
  
  <pre><code>sudo dpkg -i /home/forklift/Desktop/ROS/ros-hydro-laser-proc_0.1.3-0precise-20131015-2054-+0000_amd64.deb
  
  sudo dpkg -i /home/forklift/Desktop/ROS/ros-hydro-urg-c_1.0.403-0precise-20131010-0128-+0000_amd64.deb
  
              sudo rosdep init
  sleep 2
              rosdep update
  </code></pre>
  
  <p>The command "rosdep update" needs to be run without sudo permissions. I assumed that it was already, but I get a warning every time I run the script, and thus get locked out of the command after installation.</p>