Connect to headless Raspberry Pi over SSH?
<p>I've been searching the interwebs for hours trying to find a way to configure my Raspberry Pi to connect to the LAN and enable <code>SSH</code>. </p>

<p>My problem is: the Pi seems to boot up (all the lights come on and go blinky), but it isn't showing up on the network. I have no monitor or keyboard for it, so the entire setup must be headless.</p>

<p><strong>What I've Tried:</strong></p>

<p>To check whether the Pi appears on the network, I mainly used the following command from a Linux box (my subnet gateway is <code>10.22.0.1</code>):</p>

<pre><code>nmap -p 22 --open 10.22.*.*
</code></pre>

<p>I'm on a college campus so there are a large number of machines on the network, hence my checking port 22 (<code>SSH</code>) directly, which I understand to be enabled by default. (Apparently the default <code>SSH</code> and networking is a relatively new feature of Raspbian? Anyone care to shed light on this or how to double check?)</p>

<p>I've also tried setting a static IP as described here:
<a href="http://elinux.org/Configuring_a_Static_IP_address_on_your_Raspberry_Pi" rel="nofollow">http://elinux.org/Configuring_a_Static_IP_address_on_your_Raspberry_Pi</a></p>

<p>In all cases, the Ethernet switch the Pi is plugged into shows an orange light for the port, and for other devices which connect successfully it shows a green light. I'm not sure what that means, but I suspect it means that the Pi isn't getting an IP address.</p>

<p><strong>More Details:</strong></p>

<ul>
<li>The Pi is running a fresh image of the latest version of <code>Raspbian
Wheezy</code> (as of February 1, 2016).</li>
<li>The Pi is a model B version (yes, I know it's old), but the OS is<br>
new.</li>
<li>I am powering it with a 5V 1A wall adapter.</li>
<li>I have used the Pi successfully in the past (like 4 years ago), and
recently dug it out again with a fresh OS on an SD card.</li>
</ul>