1# date<a name="ZH-CN_TOPIC_0000001134006248"></a> 2 3- [命令功能](#section56472016338) 4- [命令格式](#section16635112512316) 5- [参数说明](#section15896030039) 6- [使用指南](#section116361036636) 7- [使用实例](#section021711411237) 8- [输出说明](#section17950184414312) 9 10## 命令功能<a name="section56472016338"></a> 11 12date命令用于查询及设置系统日期和时间。 13 14## 命令格式<a name="section16635112512316"></a> 15 16date 17 18date --help 19 20date +\[_Format_\] 21 22date -s_ _\[_YY/MM/DD_\] 23 24date_ _-s_ _\[_hh:mm:ss_\]__ 25 26date -r \[_Filename_\] 27 28## 参数说明<a name="section15896030039"></a> 29 30**表 1** 参数说明 31 32<a name="table3825mcpsimp"></a> 33<table><thead align="left"><tr id="row3831mcpsimp"><th class="cellrowborder" valign="top" width="21%" id="mcps1.2.4.1.1"><p id="p3833mcpsimp"><a name="p3833mcpsimp"></a><a name="p3833mcpsimp"></a>参数</p> 34</th> 35<th class="cellrowborder" valign="top" width="50%" id="mcps1.2.4.1.2"><p id="p3835mcpsimp"><a name="p3835mcpsimp"></a><a name="p3835mcpsimp"></a>参数说明</p> 36</th> 37<th class="cellrowborder" valign="top" width="28.999999999999996%" id="mcps1.2.4.1.3"><p id="p3837mcpsimp"><a name="p3837mcpsimp"></a><a name="p3837mcpsimp"></a>取值范围</p> 38</th> 39</tr> 40</thead> 41<tbody><tr id="row3838mcpsimp"><td class="cellrowborder" valign="top" width="21%" headers="mcps1.2.4.1.1 "><p id="p3840mcpsimp"><a name="p3840mcpsimp"></a><a name="p3840mcpsimp"></a>--help</p> 42</td> 43<td class="cellrowborder" valign="top" width="50%" headers="mcps1.2.4.1.2 "><p id="p3842mcpsimp"><a name="p3842mcpsimp"></a><a name="p3842mcpsimp"></a>使用帮助。</p> 44</td> 45<td class="cellrowborder" valign="top" width="28.999999999999996%" headers="mcps1.2.4.1.3 "><p id="p3844mcpsimp"><a name="p3844mcpsimp"></a><a name="p3844mcpsimp"></a>N/A</p> 46</td> 47</tr> 48<tr id="row3845mcpsimp"><td class="cellrowborder" valign="top" width="21%" headers="mcps1.2.4.1.1 "><p id="p3847mcpsimp"><a name="p3847mcpsimp"></a><a name="p3847mcpsimp"></a>+Format</p> 49</td> 50<td class="cellrowborder" valign="top" width="50%" headers="mcps1.2.4.1.2 "><p id="p3849mcpsimp"><a name="p3849mcpsimp"></a><a name="p3849mcpsimp"></a>根据<strong id="b3850mcpsimp"><a name="b3850mcpsimp"></a><a name="b3850mcpsimp"></a>Format</strong>格式打印日期和时间。</p> 51</td> 52<td class="cellrowborder" valign="top" width="28.999999999999996%" headers="mcps1.2.4.1.3 "><p id="p3852mcpsimp"><a name="p3852mcpsimp"></a><a name="p3852mcpsimp"></a>--help中列出的占位符。</p> 53</td> 54</tr> 55<tr id="row3853mcpsimp"><td class="cellrowborder" valign="top" width="21%" headers="mcps1.2.4.1.1 "><p id="p3855mcpsimp"><a name="p3855mcpsimp"></a><a name="p3855mcpsimp"></a>-s YY/MM/DD</p> 56</td> 57<td class="cellrowborder" valign="top" width="50%" headers="mcps1.2.4.1.2 "><p id="p3857mcpsimp"><a name="p3857mcpsimp"></a><a name="p3857mcpsimp"></a>设置系统时间，用“/”分割的年月日。</p> 58</td> 59<td class="cellrowborder" valign="top" width="28.999999999999996%" headers="mcps1.2.4.1.3 "><p id="p3859mcpsimp"><a name="p3859mcpsimp"></a><a name="p3859mcpsimp"></a>>= 1970/01/01</p> 60</td> 61</tr> 62<tr id="row3860mcpsimp"><td class="cellrowborder" valign="top" width="21%" headers="mcps1.2.4.1.1 "><p id="p3862mcpsimp"><a name="p3862mcpsimp"></a><a name="p3862mcpsimp"></a>-s hh:mm:ss</p> 63</td> 64<td class="cellrowborder" valign="top" width="50%" headers="mcps1.2.4.1.2 "><p id="p3864mcpsimp"><a name="p3864mcpsimp"></a><a name="p3864mcpsimp"></a>设置系统时间，用“:”分割的时分秒。</p> 65</td> 66<td class="cellrowborder" valign="top" width="28.999999999999996%" headers="mcps1.2.4.1.3 "><p id="p3866mcpsimp"><a name="p3866mcpsimp"></a><a name="p3866mcpsimp"></a>N/A</p> 67</td> 68</tr> 69<tr id="row3867mcpsimp"><td class="cellrowborder" valign="top" width="21%" headers="mcps1.2.4.1.1 "><p id="p3869mcpsimp"><a name="p3869mcpsimp"></a><a name="p3869mcpsimp"></a>-r Filename</p> 70</td> 71<td class="cellrowborder" valign="top" width="50%" headers="mcps1.2.4.1.2 "><p id="p3871mcpsimp"><a name="p3871mcpsimp"></a><a name="p3871mcpsimp"></a>查询Filename文件的修改时间。</p> 72</td> 73<td class="cellrowborder" valign="top" width="28.999999999999996%" headers="mcps1.2.4.1.3 "><p id="p3873mcpsimp"><a name="p3873mcpsimp"></a><a name="p3873mcpsimp"></a>N/A</p> 74</td> 75</tr> 76</tbody> 77</table> 78 79## 使用指南<a name="section116361036636"></a> 80 81- date参数缺省时，默认显示当前系统日期和时间。 82- --help、+Format、-s、-r不能混合使用。 83 84## 使用实例<a name="section021711411237"></a> 85 86举例： 87 88输入date +%Y--%m--%d。 89 90## 输出说明<a name="section17950184414312"></a> 91 92**图 1** 按指定格式打印系统日期<a name="fig152576304517"></a> 93 94 95