linux下的網絡配置命令ipconfig命令詳解

無論是Linux 自動安裝還是我們手工安裝，Linux 都會向你詢問有關網絡的問題並配置相關的軟件。這個用於配置網卡的基本命令就是ifconfig。
在執行ifconfig 命令后，系統將在內核表中設置必要的參數，這樣Linux 就知道如何與網絡上的網卡通
信。ifconfig 命令有以下兩種格式：

※ifconfig <span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(0,153,0); border-left-width:0px; padding-top:0px">[</span><strong>interface</strong><span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(0,153,0); border-left-width:0px; padding-top:0px">]</span>
※ifconfig <strong>interface</strong> <span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(0,153,0); border-left-width:0px; padding-top:0px">[</span>aftype<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(0,153,0); border-left-width:0px; padding-top:0px">]</span> option <span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">|</span> address …

ifconfig 的第一種格式（或使用不帶任何參數的ifconfig 命令）可以用來查看當前系統的網絡配置情況。
在剛剛安裝完系統之后，實際上是在沒有網卡或者網絡連接的情況下使用Linux，但通過ifconfig 可以使用回繞方式工作，使計算機認為自己工作在網絡上。
現在我們運行一下ifconfig 命令，不帶參數的ifconfig 命令可以顯示當前啟動的網絡接口，其輸出結果
為：

<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(0,153,0); border-left-width:0px; padding-top:0px">[</span>root<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">@</span>machine1 <span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">/</span>sbin<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(0,153,0); border-left-width:0px; padding-top:0px">]</span><em>#ifconfig
</em>eth0 <span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(153,0,0); border-left-width:0px; padding-top:0px">Link</span> encap<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">:</span>Ethernet Hwaddr <span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(204,102,204); border-left-width:0px; padding-top:0px">52</span><span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">:</span><span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(204,102,204); border-left-width:0px; padding-top:0px">54</span><span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">:</span>AB<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">:</span>DD<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">:</span>6F<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">:</span><span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(204,102,204); border-left-width:0px; padding-top:0px">61</span>
inet addr<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">:</span>210<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">.</span>34<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">.</span>6<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">.</span>89 Bcast<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">:</span>210<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">.</span>34<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">.</span>6<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">.</span>127 Mask<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">:</span>255<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">.</span>255<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">.</span>255<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">.</span>128
UP BROADCAST RUNNING MULTICAST MTU<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">:</span><span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(204,102,204); border-left-width:0px; padding-top:0px">1500</span> Metric<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">:</span><span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(204,102,204); border-left-width:0px; padding-top:0px">1</span>
RX packets<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">:</span><span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(204,102,204); border-left-width:0px; padding-top:0px">46299</span> errors<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">:</span><span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(204,102,204); border-left-width:0px; padding-top:0px">0</span> dropped<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">:</span><span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(204,102,204); border-left-width:0px; padding-top:0px">0</span> overruns<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">:</span><span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(204,102,204); border-left-width:0px; padding-top:0px">0</span> frame<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">:</span><span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(204,102,204); border-left-width:0px; padding-top:0px">189</span>
TX packets<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">:</span><span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(204,102,204); border-left-width:0px; padding-top:0px">3057</span> errors<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">:</span><span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(204,102,204); border-left-width:0px; padding-top:0px">0</span> dropped<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">:</span><span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(204,102,204); border-left-width:0px; padding-top:0px">0</span> overruns<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">:</span><span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(204,102,204); border-left-width:0px; padding-top:0px">0</span> carrier<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">:</span><span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(204,102,204); border-left-width:0px; padding-top:0px">0</span>
collisions<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">:</span><span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(204,102,204); border-left-width:0px; padding-top:0px">0</span> txqueuelen<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">:</span><span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(204,102,204); border-left-width:0px; padding-top:0px">100</span>
Interrupt<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">:</span><span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(204,102,204); border-left-width:0px; padding-top:0px">5</span> Base address<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">:</span><span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(32,128,128); border-left-width:0px; padding-top:0px">0xece0</span>
lo <span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(153,0,0); border-left-width:0px; padding-top:0px">Link</span> encap<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">:</span>Local Loopback
inet addr<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">:</span>127<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">.</span>0<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">.</span>0<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">.</span>1 Mask<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">:</span>255<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">.</span>0<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">.</span>0<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">.</span>0
UP LOOPBACK RUNNING MTU<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">:</span><span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(204,102,204); border-left-width:0px; padding-top:0px">3924</span> Metric<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">:</span><span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(204,102,204); border-left-width:0px; padding-top:0px">1</span>
RX packets<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">:</span><span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(204,102,204); border-left-width:0px; padding-top:0px">44</span> errors<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">:</span><span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(204,102,204); border-left-width:0px; padding-top:0px">0</span> dropped<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">:</span><span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(204,102,204); border-left-width:0px; padding-top:0px">0</span> overruns<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">:</span><span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(204,102,204); border-left-width:0px; padding-top:0px">0</span> frame<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">:</span><span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(204,102,204); border-left-width:0px; padding-top:0px">0</span>
TX packets<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">:</span><span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(204,102,204); border-left-width:0px; padding-top:0px">44</span> errors<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">:</span><span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(204,102,204); border-left-width:0px; padding-top:0px">0</span> dropped<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">:</span><span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(204,102,204); border-left-width:0px; padding-top:0px">0</span> overruns<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">:</span><span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(204,102,204); border-left-width:0px; padding-top:0px">0</span> carrier<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">:</span><span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(204,102,204); border-left-width:0px; padding-top:0px">0</span>
collisions<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">:</span><span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(204,102,204); border-left-width:0px; padding-top:0px">0</span> txqueuelen<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">:</span><span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(204,102,204); border-left-width:0px; padding-top:0px">0</span>

其中以eth0 為首的部分是本機的以太網卡配置參數，這里顯示了網卡在下的設備名/dev/eth0 和硬件的MAC 地址52:54:AB:DD:6F:61，MAC 地址是生產廠家定的，每個網卡擁有的唯一地址。
不過我們可以手工改動網卡的MAC 地址，只要我們在/etc/rc.d/init.d/中的network 中加入：

ifconfig eth0 hw ether xx<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">:</span>xx<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">:</span>xx<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">:</span>xx<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">:</span>xx<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">:</span>xx

然后重啟，此時再用ifconfig 命令查看一下，我們就會發現網卡的MAC 地址已經變成xx:xx:xx:xx:xx:xx
了。
下一行顯示本機的IP 地址信息，分別是本機的IP 地址，網絡廣播地址和子網掩碼。必須確認這些信息都是正確無誤的，否則Linux 服務器無法與其它網絡設備建立連接。我們也可以手工實現IP 與Mac 地址的
捆綁，命令是

arp <span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">-</span>i eth0 <span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">-</span>s xxx<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">.</span>xxx<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">.</span>xxx<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">.</span>xxx<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(0,153,0); border-left-width:0px; padding-top:0px">(</span>IP<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(0,153,0); border-left-width:0px; padding-top:0px">)</span> xx<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">.</span>xx<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">.</span>xx<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">.</span>xx<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">.</span>xx<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(0,153,0); border-left-width:0px; padding-top:0px">(</span>MAC<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(0,153,0); border-left-width:0px; padding-top:0px">)</span>

接下來顯示的是設備的網絡狀態。MTU（最大傳輸單元）和Metric（度量值）字段顯示的是該接口當前的
M T U 和度量值的值。按照慣例，度量值供某些操作系統所用，用於計算一條路由的成本。
再下來顯示接口通信的網絡統計值。RX 和TX 分別表示接收和傳送的數據包。如果你的網卡已經完成配置卻還是無法與其它設備通信，那么從RX 和TX 的顯示數據上可以簡單地分析一下故障原因。在這種情況下，如果你看到接收和傳送的包的計數(packets)增加，那有可能是系統的IP 地址出現了混亂；如果你看到大量的錯誤(errors)和沖突(Collisions)，那么這很有可能是網絡的傳輸介質出了問題，例如網線不通或hub損壞。
再下面的Interrupt:5 Base address:0xece0 顯示的是網卡的中斷調用號和端口號，這是兩個非常重要的硬件配置信息。如果您的網卡是PCI 的，那么Linux 在引導時有可能會自動配置這些信息（也很有可能會讓您手工配置）但目前絕大多數網卡都是PnP 的，這就需要我們進行手工配置了。如果您的網卡還沒有
配置好，那么運行：

<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(0,153,0); border-left-width:0px; padding-top:0px">[</span>root<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">@</span>machine1 <span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">/</span>sbin<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(0,153,0); border-left-width:0px; padding-top:0px">]</span><em>#ifconfig</em>

系統只會輸出以lo 為首的部分。lo 是look-back 網絡接口，從IP 地址127.0.0.1 就可以看出，它代表”本機”。無論系統是否接入網絡，這個設備總是存在的，除非你在內核編譯的時候禁止了網絡支持，這是一個稱為回送設備的特殊設備，它自動由Linux 配置以提供網絡的自身連接。IP 地址 127.0.0.1 是一個特殊的回送地址（即默認的本機地址），您可以在自己的系統上用telnet 對IP 地址127.0.0.1 進行測試。如果有inetd進程在運行的話您會從自己的機器上獲得登錄提示符。Linux 可以利用這個特征在進程與仿真網絡之間進行通信。（您有興趣的話還可以試試本機的實際IP 地址，如這里的機器就是210.34.6.89，或者試試”localhost”，或者”127.0.0.1″，同樣可以模擬網絡通信。這可是Linux 一個非常突出的優點！）
如果你只是關心某個設備是否正常，可以在ifconfig 后面加上接口名字：

<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(0,153,0); border-left-width:0px; padding-top:0px">[</span>root<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">@</span>machine1 <span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">/</span>sbin<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(0,153,0); border-left-width:0px; padding-top:0px">]</span><em># ifconfig eth0
</em>eth0 <span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(153,0,0); border-left-width:0px; padding-top:0px">Link</span> encap<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">:</span>Ethernet HWaddr <span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(204,102,204); border-left-width:0px; padding-top:0px">52</span><span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">:</span><span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(204,102,204); border-left-width:0px; padding-top:0px">54</span><span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">:</span>AB<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">:</span>DD<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">:</span>6F<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">:</span><span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(204,102,204); border-left-width:0px; padding-top:0px">61</span>
inet addr<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">:</span>210<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">.</span>34<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">.</span>6<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">.</span>89 Bcast<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">:</span>210<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">.</span>34<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">.</span>6<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">.</span>127 Mask<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">:</span>255<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">.</span>255<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">.</span>255<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">.</span>128
UP BROADCAST RUNNING MULTICAST MTU<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">:</span><span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(204,102,204); border-left-width:0px; padding-top:0px">1500</span> Metric<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">:</span><span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(204,102,204); border-left-width:0px; padding-top:0px">1</span>
RX packets<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">:</span><span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(204,102,204); border-left-width:0px; padding-top:0px">50568</span> errors<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">:</span><span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(204,102,204); border-left-width:0px; padding-top:0px">0</span> dropped<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">:</span><span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(204,102,204); border-left-width:0px; padding-top:0px">0</span> overruns<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">:</span><span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(204,102,204); border-left-width:0px; padding-top:0px">0</span> frame<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">:</span><span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(204,102,204); border-left-width:0px; padding-top:0px">198</span>
TX packets<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">:</span><span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(204,102,204); border-left-width:0px; padding-top:0px">3200</span> errors<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">:</span><span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(204,102,204); border-left-width:0px; padding-top:0px">0</span> dropped<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">:</span><span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(204,102,204); border-left-width:0px; padding-top:0px">0</span> overruns<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">:</span><span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(204,102,204); border-left-width:0px; padding-top:0px">0</span> carrier<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">:</span><span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(204,102,204); border-left-width:0px; padding-top:0px">0</span>
collisions<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">:</span><span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(204,102,204); border-left-width:0px; padding-top:0px">0</span> txqueuelen<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">:</span><span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(204,102,204); border-left-width:0px; padding-top:0px">100</span>
Interrupt<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">:</span><span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(204,102,204); border-left-width:0px; padding-top:0px">5</span> Base address<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">:</span><span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(32,128,128); border-left-width:0px; padding-top:0px">0xece0</span>

表示eth0 設備已經正常工作。
有時需要為某個設備接口配置多個IP 地址，辦法是使用設備別名，例如，eth0 設備可以有eth0，eth0:0，
eth0:1….多個別名，每個都可以有一個獨立的IP 地址：

ifconfig eth0 210<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">.</span>34<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">.</span>6<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">.</span>89 netmask 255<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">.</span>255<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">.</span>255<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">.</span>128 broadcast 210<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">.</span>34<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">.</span>6<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">.</span>127
ifconfig eth0<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">:</span><span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(204,102,204); border-left-width:0px; padding-top:0px">0</span> 210<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">.</span>34<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">.</span>6<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">.</span>88 netmask 255<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">.</span>255<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">.</span>255<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">.</span>128 broadcast 210<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">.</span>34<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">.</span>6<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-left:0px; padding-right:0px; font-family:inherit; border-top-width:0px; border-bottom-width:0px; color:rgb(51,153,51); border-left-width:0px; padding-top:0px">.</span>127

這樣，210.34.6.89 和210.34.6.88 都會被綁定在eth0 設備上，使用同樣的網絡設備，不同的IP 地址。
如果你要暫停某個網絡接口的工作，使用down 參數：

ifconfig eth0 down

將取消eth0 網絡接口。與之對應的是有一個參數up，不過由於是缺省值，所以從來不用。
如果我們使用了帶有參數的ifconfig 命令，那就可以手動設置網卡的配置參數了。有效的ifconfig 命令參數及其意義為(選項對應的特性可以打開也可以取消，只在選項名前加一個破折號（-）即可)：
Interface 網絡設備名，如eth0 就表示本機的第一塊網卡。
up 標志接口處於” up”狀態，也就是說， IP 層可以對其進行訪問。這個選項用於命令行上給出一個地址之時。如果這個接口已被” down”選項臨時性取消的話（與該選項對應的標記是UP RUNNING），還可以用於重新啟用一個接口。down 標標志接口處於” down”狀態，也就是說， IP 層不能對其進行訪問。這個選項有效地禁止了IP 通信流通這個接口。注意，它並沒有自動刪除利用該接口的所有路由信息。如果永久性地取消了一個接口，就應該刪除這些路由條目，並在可能的情況下，提供備用路由。
netmask 標分配子網掩碼，供接口所用。要么給一個前面是0x 的32 位十六進制號碼，要么采用只適用於兩台主機所用的點分四段式號碼。對SLIP 和PLIP 接口來說，這個選項是必須配置的。
address 設置指定接口設備的IP 地址。
dstaddr adderss 為PPP 設置遠程IP 地址，此關鍵字可用pointopoint 代替。
irqaddress 設置指定接口設備使用的中斷行。
pointtopoint address 該選項用於只涉及兩台主機的點到點鏈接。對SLIP 和PLIP 接口來說，這個選項是必須配置的（如果已經設置了一個點到點地址，ifconfig 就會顯示出POINTTPOINT 標記）。
broadcast address 廣播地址通常源於網絡編號，通過設置主機部分的所有位得來。有的I P 采用的方案有所不同：這個選項可適用於某些奇怪的環境（如果已經設置了廣播地址， ifconfig 就會顯示出一個BROADCAST 標記）。hw class addr 設置指定接口設備的MAC 地址，關鍵字的后面必須跟硬件名或者與之等價的ASCII碼。目前支持的硬件類有ether, ax25, ARCnet 和netrom。
metric number 該選項可用於為接口創建的路由表分配度量值。路由信息協議（ RIP）利用度量值來構建
網絡路由表。ifconfig 所用的默認度量值是0。如果不運行RIP 程序，就沒必要采用這個選項。如果要運行RIP 程序，就盡量不要改變這個默認的度量值。
mtu bytes 該選項用於設置最大傳輸單元，也就是接口一次能處理的最大字節數。對以太網接口來說， MTU的默認設置是1500 個字節；對SLIP 接口來說，則是296 個字節。
arp 標這個選項專用於以太網或包廣播之類的廣播網絡。它啟用ARP（地址解析協議）來保護網絡上各台
主機的物理地址。對廣播網來說，默認設置是” on”（開）。
promisc 將接口置入promiscuous（混亂）模式。廣播網中，這樣將導致該接口接收所有的數據包，不管其目標是不是另一台主機。該選項允許利用包過濾器和所謂的以太網窺視技術，對網絡通信進行分析。通常情況下，這對揪出網絡故障的元凶來說，是相當有用的。但另一方面，如果有人蓄意攻擊你的網絡，也可瀏覽到 s 通信數據，進而獲得密碼，破壞你的網絡。一項重要的保證措施是杜絕任何人將他們的計算機接入你的以太網。另一個選項用於保護某些身份驗證協議的安全，比如Kerberos 或SRA 登錄套件（該選項對應的標記是PROMISC）。
traIlers 開或關閉跟蹤器。目前在某些Linux 系統中還無法實現此功能。
allmulti 多播地址即是向不在同一個子網上的一組主機廣播數據。多播地址尚未獲得內核支持（該選項對應的標記是ALLMULTI）txqueuelen len 設置指定接口設備的發送隊列長度。
由此可以看出有大量的參數可用於配置網卡，下面是在這台計算機上使用ifconfig 命令的實例：

[php] view plain copy

ifconfig eth0 210<span style="padding-bottom:0px; border-right-width:0px; margin-top:0px; margin-right:0px; margin-