1# touch<a name="EN-US_TOPIC_0000001134006268"></a> 2 3- [Command Function](#section17541924112716) 4- [Syntax](#section866182711274) 5- [Parameters](#section268912296270) 6- [Usage](#section412093332714) 7- [Example](#section414434814354) 8- [Output](#section1028419515711) 9 10## Command Function<a name="section17541924112716"></a> 11 12- This command is used to create an empty file in a specified directory. 13- If this command is executed to create an existing file, the execution will be successful but the timestamp will not be updated. 14 15## Syntax<a name="section866182711274"></a> 16 17touch \[_filename_\] 18 19## Parameters<a name="section268912296270"></a> 20 21**Table 1** Parameter description 22 23<a name="table1635mcpsimp"></a> 24<table><thead align="left"><tr id="row1642mcpsimp"><th class="cellrowborder" valign="top" width="20.73%" id="mcps1.2.4.1.1"><p id="p1653mcpsimp"><a name="p1653mcpsimp"></a><a name="p1653mcpsimp"></a><strong id="b132581435193918"><a name="b132581435193918"></a><a name="b132581435193918"></a>Parameter</strong></p> 25</th> 26<th class="cellrowborder" valign="top" width="52.44%" id="mcps1.2.4.1.2"><p id="p1655mcpsimp"><a name="p1655mcpsimp"></a><a name="p1655mcpsimp"></a><strong id="b88661537163918"><a name="b88661537163918"></a><a name="b88661537163918"></a>Description</strong></p> 27</th> 28<th class="cellrowborder" valign="top" width="26.83%" id="mcps1.2.4.1.3"><p id="p1657mcpsimp"><a name="p1657mcpsimp"></a><a name="p1657mcpsimp"></a><strong id="b164851738193910"><a name="b164851738193910"></a><a name="b164851738193910"></a>Value Range</strong></p> 29</th> 30</tr> 31</thead> 32<tbody><tr id="row1684mcpsimp"><td class="cellrowborder" valign="top" width="20.73%" headers="mcps1.2.4.1.1 "><p id="p1686mcpsimp"><a name="p1686mcpsimp"></a><a name="p1686mcpsimp"></a>filename</p> 33</td> 34<td class="cellrowborder" valign="top" width="52.44%" headers="mcps1.2.4.1.2 "><p id="p1688mcpsimp"><a name="p1688mcpsimp"></a><a name="p1688mcpsimp"></a>Specifies the name of the file to be created.</p> 35</td> 36<td class="cellrowborder" valign="top" width="26.83%" headers="mcps1.2.4.1.3 "><p id="p1690mcpsimp"><a name="p1690mcpsimp"></a><a name="p1690mcpsimp"></a>N/A</p> 37</td> 38</tr> 39</tbody> 40</table> 41 42## Usage<a name="section412093332714"></a> 43 44- The **touch** command creates an empty file that is readable and writeable. 45- The **touch** command creates only one file at a time. 46 47 > **NOTICE:** 48 >If you run the **touch** command to create a file in a path storing important system resources, unexpected results such as a system breakdown may occur. For example, if you run the **touch uartdev-0** command in the **/dev** path, the system may stop responding. 49 50 51## Example<a name="section414434814354"></a> 52 53Run **touch file.c**. 54 55## Output<a name="section1028419515711"></a> 56 57**Figure 1** Creating **file.c**<a name="fig188183221532"></a> 58 59 60
