shell读取文件的每一行

写法一：

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#!/bin/bash



while read line

do

    echo $line

done < filename(待读取的文件)

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写法二：

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#!/bin/bash



cat filename(待读取的文件) | while read line

do

    echo $line

done

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写法三：

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for line in `cat filename(待读取的文件)`

do

    echo $line

done