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                            grep 命令用于查找文件里符合條件的字符串。

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>[info] \-r 遞歸。
> \-n 在顯示符合樣式的那一行之前，標示出該行的列數編號。
> \-v 顯示不包含匹配文本的所有行。

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在當前目錄下把包含”sdmmc”的文件查找出來：grep "sdmmc" -rn ./

![](https://img.kancloud.cn/2b/8f/2b8f4f39f31386492ca62fef87e1e74a_832x270.png =600x)

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把ls的輸出結果包含字符串”pid”的內容進行輸出：ls | grep "pid"

![](https://img.kancloud.cn/67/96/679691a72159df57f6c250ab14146903_832x402.png =600x)

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把ls的輸出結果不包含字符串”pid”的內容進行輸出：ls | grep -v "pid"
![](https://img.kancloud.cn/4d/db/4ddb11d8e3fa99fc1827d2b3ebe928e9_832x268.png =600x)
                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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