1# watch<a name="ZH-CN_TOPIC_0000001134006258"></a> 2 3- [命令功能](#section20643141481314) 4- [命令格式](#section1075441721316) 5- [参数说明](#section1472810220135) 6- [使用指南](#section186772414131) 7- [使用实例](#section4764192791314) 8- [输出说明](#section5791253155517) 9 10## 命令功能<a name="section20643141481314"></a> 11 12watch命令用于周期性的监视一个命令的运行结果。 13 14## 命令格式<a name="section1075441721316"></a> 15 16watch 17 18watch \[_-c/-n/-t/--count/--interval/-no-title/--over_\] \[_command_\] 19 20## 参数说明<a name="section1472810220135"></a> 21 22**表 1** 参数说明 23 24<a name="table966mcpsimp"></a> 25<table><thead align="left"><tr id="row973mcpsimp"><th class="cellrowborder" valign="top" width="19.801980198019802%" id="mcps1.2.5.1.1"><p id="p975mcpsimp"><a name="p975mcpsimp"></a><a name="p975mcpsimp"></a>参数</p> 26</th> 27<th class="cellrowborder" valign="top" width="29.222922292229224%" id="mcps1.2.5.1.2"><p id="p977mcpsimp"><a name="p977mcpsimp"></a><a name="p977mcpsimp"></a>参数说明</p> 28</th> 29<th class="cellrowborder" valign="top" width="22.26222622262226%" id="mcps1.2.5.1.3"><p id="p979mcpsimp"><a name="p979mcpsimp"></a><a name="p979mcpsimp"></a>缺省值</p> 30</th> 31<th class="cellrowborder" valign="top" width="28.712871287128717%" id="mcps1.2.5.1.4"><p id="p981mcpsimp"><a name="p981mcpsimp"></a><a name="p981mcpsimp"></a>取值范围</p> 32</th> 33</tr> 34</thead> 35<tbody><tr id="row982mcpsimp"><td class="cellrowborder" valign="top" width="19.801980198019802%" headers="mcps1.2.5.1.1 "><p id="p984mcpsimp"><a name="p984mcpsimp"></a><a name="p984mcpsimp"></a>-c / --count</p> 36</td> 37<td class="cellrowborder" valign="top" width="29.222922292229224%" headers="mcps1.2.5.1.2 "><p id="p986mcpsimp"><a name="p986mcpsimp"></a><a name="p986mcpsimp"></a>命令执行的总次数。</p> 38</td> 39<td class="cellrowborder" valign="top" width="22.26222622262226%" headers="mcps1.2.5.1.3 "><p id="p988mcpsimp"><a name="p988mcpsimp"></a><a name="p988mcpsimp"></a>0xFFFFFF</p> 40</td> 41<td class="cellrowborder" valign="top" width="28.712871287128717%" headers="mcps1.2.5.1.4 "><p id="p990mcpsimp"><a name="p990mcpsimp"></a><a name="p990mcpsimp"></a>（0,0xFFFFFF]</p> 42</td> 43</tr> 44<tr id="row991mcpsimp"><td class="cellrowborder" valign="top" width="19.801980198019802%" headers="mcps1.2.5.1.1 "><p id="p993mcpsimp"><a name="p993mcpsimp"></a><a name="p993mcpsimp"></a>-n / --interval</p> 45</td> 46<td class="cellrowborder" valign="top" width="29.222922292229224%" headers="mcps1.2.5.1.2 "><p id="p995mcpsimp"><a name="p995mcpsimp"></a><a name="p995mcpsimp"></a>命令周期性执行的时间间隔（s）。</p> 47</td> 48<td class="cellrowborder" valign="top" width="22.26222622262226%" headers="mcps1.2.5.1.3 "><p id="p997mcpsimp"><a name="p997mcpsimp"></a><a name="p997mcpsimp"></a>1s</p> 49</td> 50<td class="cellrowborder" valign="top" width="28.712871287128717%" headers="mcps1.2.5.1.4 "><p id="p999mcpsimp"><a name="p999mcpsimp"></a><a name="p999mcpsimp"></a>（0,0xFFFFFF]</p> 51</td> 52</tr> 53<tr id="row1000mcpsimp"><td class="cellrowborder" valign="top" width="19.801980198019802%" headers="mcps1.2.5.1.1 "><p id="p1002mcpsimp"><a name="p1002mcpsimp"></a><a name="p1002mcpsimp"></a>-t / -no-title</p> 54</td> 55<td class="cellrowborder" valign="top" width="29.222922292229224%" headers="mcps1.2.5.1.2 "><p id="p1004mcpsimp"><a name="p1004mcpsimp"></a><a name="p1004mcpsimp"></a>关闭顶端的时间显示。</p> 56</td> 57<td class="cellrowborder" valign="top" width="22.26222622262226%" headers="mcps1.2.5.1.3 "><p id="p1006mcpsimp"><a name="p1006mcpsimp"></a><a name="p1006mcpsimp"></a>N/A</p> 58</td> 59<td class="cellrowborder" valign="top" width="28.712871287128717%" headers="mcps1.2.5.1.4 "><p id="p1008mcpsimp"><a name="p1008mcpsimp"></a><a name="p1008mcpsimp"></a>N/A</p> 60</td> 61</tr> 62<tr id="row1009mcpsimp"><td class="cellrowborder" valign="top" width="19.801980198019802%" headers="mcps1.2.5.1.1 "><p id="p1011mcpsimp"><a name="p1011mcpsimp"></a><a name="p1011mcpsimp"></a>command</p> 63</td> 64<td class="cellrowborder" valign="top" width="29.222922292229224%" headers="mcps1.2.5.1.2 "><p id="p1013mcpsimp"><a name="p1013mcpsimp"></a><a name="p1013mcpsimp"></a>需要监测的命令。</p> 65</td> 66<td class="cellrowborder" valign="top" width="22.26222622262226%" headers="mcps1.2.5.1.3 "><p id="p1015mcpsimp"><a name="p1015mcpsimp"></a><a name="p1015mcpsimp"></a>N/A</p> 67</td> 68<td class="cellrowborder" valign="top" width="28.712871287128717%" headers="mcps1.2.5.1.4 "><p id="p1017mcpsimp"><a name="p1017mcpsimp"></a><a name="p1017mcpsimp"></a>N/A</p> 69</td> 70</tr> 71<tr id="row1018mcpsimp"><td class="cellrowborder" valign="top" width="19.801980198019802%" headers="mcps1.2.5.1.1 "><p id="p1020mcpsimp"><a name="p1020mcpsimp"></a><a name="p1020mcpsimp"></a>--over</p> 72</td> 73<td class="cellrowborder" valign="top" width="29.222922292229224%" headers="mcps1.2.5.1.2 "><p id="p1022mcpsimp"><a name="p1022mcpsimp"></a><a name="p1022mcpsimp"></a>关闭当前监测指令。</p> 74</td> 75<td class="cellrowborder" valign="top" width="22.26222622262226%" headers="mcps1.2.5.1.3 "><p id="p1024mcpsimp"><a name="p1024mcpsimp"></a><a name="p1024mcpsimp"></a>N/A</p> 76</td> 77<td class="cellrowborder" valign="top" width="28.712871287128717%" headers="mcps1.2.5.1.4 "><p id="p1026mcpsimp"><a name="p1026mcpsimp"></a><a name="p1026mcpsimp"></a>N/A</p> 78</td> 79</tr> 80</tbody> 81</table> 82 83## 使用指南<a name="section186772414131"></a> 84 85watch运行过程中可以执行**watch --over**结束本次watch命令。 86 87## 使用实例<a name="section4764192791314"></a> 88 89输入举例： 90 91watch -n 2 -c 6 task 92 93## 输出说明<a name="section5791253155517"></a> 94 95**图 1** watch task 结果<a name="fig125034159462"></a> 96 97 98> **说明：** 99>示例中，总共有6次task命令打印，每次间隔2秒，截图为最后一次打印详情。 100 101
