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+<table class="head">
+ <tr>
+ <td class="head-ltitle">ETHERS(5)</td>
+ <td class="head-vol">File Formats Manual</td>
+ <td class="head-rtitle">ETHERS(5)</td>
+ </tr>
+</table>
+<div class="manual-text">
+<section class="Sh">
+<h1 class="Sh" id="NAME"><a class="permalink" href="#NAME">NAME</a></h1>
+<p class="Pp"><code class="Nm">ethers</code> &#x2014; <span class="Nd">ethernet
+ address database</span></p>
+</section>
+<section class="Sh">
+<h1 class="Sh" id="DESCRIPTION"><a class="permalink" href="#DESCRIPTION">DESCRIPTION</a></h1>
+<p class="Pp">The <code class="Nm">ethers</code> database contains information
+ regarding known 48-bit ethernet addresses of hosts on an Internetwork. The
+ data is stored in a file called <span class="Pa">/etc/ethers</span> in the
+ following format:</p>
+<p class="Pp"></p>
+<div class="Bd Bd-indent"><var class="Ar">ethernet-address
+ fully-qualified-host-name</var></div>
+<p class="Pp">Items are separated by any number of blanks and/or tab characters.
+ A ``#'' at the start of a line indicates the beginning of a comment that
+ extends to the end of the line. A ``+'' at the start of a line will cause
+ the <a class="Xr">ethers(3)</a> library functions to use data stored in the
+ NIS <span class="Pa">ethers.byname</span> and
+ <span class="Pa">ethers.byaddr</span> maps in addition to the data in the
+ <span class="Pa">/etc/ethers</span> file.</p>
+<p class="Pp">An ethernet address is expressed in ASCII form as
+ &quot;x:x:x:x:x:x&quot; where <var class="Ar">x</var> is a hexadecimal value
+ between 0x00 and 0xFF. The address values should be in network order.
+ Hostnames specified in the <span class="Pa">/etc/ethers</span> database
+ should correspond to entries in the <a class="Xr">hosts(5)</a> file.</p>
+<p class="Pp" id="ether_line">The
+ <a class="permalink" href="#ether_line"><code class="Fn">ether_line</code></a>()
+ function in the standard C library can be used to break individual lines in
+ the <span class="Pa">/etc/ethers</span> database into their individual
+ components: a binary Ethernet address stored as an
+ <span class="Pa">ether_addr</span> structure, and a hostname stored as a
+ character string.</p>
+</section>
+<section class="Sh">
+<h1 class="Sh" id="FILES"><a class="permalink" href="#FILES">FILES</a></h1>
+<dl class="Bl-tag Bl-compact">
+ <dt><span class="Pa">/etc/ethers</span></dt>
+ <dd>The <code class="Nm">ethers</code> file resides in
+ <span class="Pa">/etc</span>.</dd>
+</dl>
+</section>
+<section class="Sh">
+<h1 class="Sh" id="SEE_ALSO"><a class="permalink" href="#SEE_ALSO">SEE
+ ALSO</a></h1>
+<p class="Pp"><a class="Xr">ethers(3)</a>, <a class="Xr">yp(8)</a></p>
+</section>
+<section class="Sh">
+<h1 class="Sh" id="HISTORY"><a class="permalink" href="#HISTORY">HISTORY</a></h1>
+<p class="Pp">The <code class="Nm">ethers</code> format is based on the format
+ used in SunOS 4.1.x.</p>
+</section>
+</div>
+<table class="foot">
+ <tr>
+ <td class="foot-date">April 12, 1995</td>
+ <td class="foot-os">FreeBSD 15.0</td>
+ </tr>
+</table>