title: Debian 8: unable to locate package
body: <p>I have installed Debian 8 (from live debian-live-8.7.1-i386-xfce-desktop.iso) on VirtualBox.</p>
  
  <p>I'm trying to do all the steps described here <a href="https://wiki.draglet.com/index.php/Manual:Installation_manual" rel="nofollow noreferrer">https://wiki.draglet.com/index.php/Manual:Installation_manual</a></p>
  
  <p>On this step The following Debian 8 packages are required to run draglet:</p>
  
  <pre><code>apt-get install exim4 ntp pwgen curl php5-dev php-pear pkg-config nmap libzmq3 libzmq3-dev libapache2-mod-php5 apache2 percona-server-server-5.6 php5-cli php5-mysql php5-curl php5-intl daemontools-run oracle-java8-installer ant ruby-compass libtool-bin
  </code></pre>
  
  <p>when I execute this command I get the output </p>
  
  <blockquote>
    <p>unable to locate package</p>
  </blockquote>
  
  <p>.... I get this message for <code>ntp</code>, <code>pwgen</code> and other packages. </p>
  
  <p>How can I install them?</p>