1# dns<a name="ZH-CN_TOPIC_0000001179965857"></a> 2 3- [命令功能](#section997513673713) 4- [命令格式](#section146015943711) 5- [参数说明](#section5732111163716) 6- [使用指南](#section15642141417371) 7- [使用实例](#section1995841617370) 8- [输出说明](#section1114210258917) 9 10## 命令功能<a name="section997513673713"></a> 11 12命令用于查看和设置单板dns服务器地址。 13 14## 命令格式<a name="section146015943711"></a> 15 16dns <_1-2_\> <_IP_\> 17 18dns _-a_ 19 20## 参数说明<a name="section5732111163716"></a> 21 22**表 1** 参数说明 23 24<a name="table1942mcpsimp"></a> 25<table><thead align="left"><tr id="row1948mcpsimp"><th class="cellrowborder" valign="top" width="20.79%" id="mcps1.2.4.1.1"><p id="p1950mcpsimp"><a name="p1950mcpsimp"></a><a name="p1950mcpsimp"></a>参数</p> 26</th> 27<th class="cellrowborder" valign="top" width="52.480000000000004%" id="mcps1.2.4.1.2"><p id="p1952mcpsimp"><a name="p1952mcpsimp"></a><a name="p1952mcpsimp"></a>参数说明</p> 28</th> 29<th class="cellrowborder" valign="top" width="26.729999999999997%" id="mcps1.2.4.1.3"><p id="p1954mcpsimp"><a name="p1954mcpsimp"></a><a name="p1954mcpsimp"></a>取值范围</p> 30</th> 31</tr> 32</thead> 33<tbody><tr id="row1955mcpsimp"><td class="cellrowborder" valign="top" width="20.79%" headers="mcps1.2.4.1.1 "><p id="p1957mcpsimp"><a name="p1957mcpsimp"></a><a name="p1957mcpsimp"></a><1-2></p> 34</td> 35<td class="cellrowborder" valign="top" width="52.480000000000004%" headers="mcps1.2.4.1.2 "><p id="p1959mcpsimp"><a name="p1959mcpsimp"></a><a name="p1959mcpsimp"></a>选择设置第一个还是第二个DNS服务器。</p> 36</td> 37<td class="cellrowborder" valign="top" width="26.729999999999997%" headers="mcps1.2.4.1.3 "><p id="p1961mcpsimp"><a name="p1961mcpsimp"></a><a name="p1961mcpsimp"></a>1~2</p> 38</td> 39</tr> 40<tr id="row1962mcpsimp"><td class="cellrowborder" valign="top" width="20.79%" headers="mcps1.2.4.1.1 "><p id="p1964mcpsimp"><a name="p1964mcpsimp"></a><a name="p1964mcpsimp"></a><IP></p> 41</td> 42<td class="cellrowborder" valign="top" width="52.480000000000004%" headers="mcps1.2.4.1.2 "><p id="p1966mcpsimp"><a name="p1966mcpsimp"></a><a name="p1966mcpsimp"></a>服务器IP地址。</p> 43</td> 44<td class="cellrowborder" valign="top" width="26.729999999999997%" headers="mcps1.2.4.1.3 "><p id="entry1967mcpsimpp0"><a name="entry1967mcpsimpp0"></a><a name="entry1967mcpsimpp0"></a>N/A</p> 45</td> 46</tr> 47<tr id="row1968mcpsimp"><td class="cellrowborder" valign="top" width="20.79%" headers="mcps1.2.4.1.1 "><p id="p1970mcpsimp"><a name="p1970mcpsimp"></a><a name="p1970mcpsimp"></a>-a</p> 48</td> 49<td class="cellrowborder" valign="top" width="52.480000000000004%" headers="mcps1.2.4.1.2 "><p id="p1972mcpsimp"><a name="p1972mcpsimp"></a><a name="p1972mcpsimp"></a>显示当前设置情况。</p> 50</td> 51<td class="cellrowborder" valign="top" width="26.729999999999997%" headers="mcps1.2.4.1.3 "><p id="entry1973mcpsimpp0"><a name="entry1973mcpsimpp0"></a><a name="entry1973mcpsimpp0"></a>N/A</p> 52</td> 53</tr> 54</tbody> 55</table> 56 57## 使用指南<a name="section15642141417371"></a> 58 59无。 60 61## 使用实例<a name="section1995841617370"></a> 62 63举例： 64 651. 检查当前DNS设置。 662. 设置第二个DNS服务器IP。 673. 检查DNS设置是否成功。 68 69## 输出说明<a name="section1114210258917"></a> 70 711. 检查当前DNS设置： 72 73 ``` 74 OHOS # dns -a 75 dns1: 192.168.1.10 76 dns2: 0.0.0.0 77 ``` 78 792. 设置第二个DNS服务器IP： 80 81 ``` 82 OHOS # dns 2 192.168.1.2 83 ``` 84 853. 检查DNS设置是否成功： 86 87 ``` 88 OHOS # dns -a 89 dns1: 192.168.1.10 90 dns2: 192.168.1.2 91 ``` 92 93 94