title: Raspberry pi 3 wireless error
body: <p>i just purchased new pi 3. <a href="https://www.raspberrypi.org/downloads/raspbian/" rel="nofollow">i installed jessie from here</a></p>
  
  <p>there's no problem at installation, <code>startx</code> command works, available network wifi also successfully scanned using <code>sudo iwlist wlan0 scan</code> command. the problem is when i use "ifup wlan0" it replied with <code>command not found</code>. so does <code>ifdown wlan0</code>. i also tried several raspbian installer such as wheezy and an older jessie, but same problem occured. anyone has same error or is there any solution? thanks in advance</p>
  
  <p><em>edited</em></p>
  
  <p>just found out that same error occurred on eth0 module. 
  here's my interfaces script
  (i have try several mode, but same error occurred from default interfaces script to my pi-2 interfaces script)</p>
  
  <pre><code>auto lo
  auto wlan0
  allow-hotplug wlan0
  iface wlan0 inet dhcp
  wireless-essid "wifi-server-test"
  
  auto eth0
  allow-hotplug eth0
  iface eth0 inet static
  address 192.168.137.77
  netmask 255.255.255.0
  gateway 192.168.137.1
  </code></pre>
  
  <p>it seems the main error is the <strong>ifup</strong> and <strong>ifdown</strong> itself  </p>