Shell脚本，执行解释速度快、代码简单易于理解。在shell代码编写过程中，经常会用到读取文件内容…

写法一

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#!/bin/bash
 while read line
do
 echo $line
done < file(待读取的文件)
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写法二

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#!/bin/bash
cat file(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 file(待读取的文件)`  #读取的文件分行的，以空格为分行符
do
 echo $line
done
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汇总写法

1.釜底抽薪

while read LINE
do
echo $LINE
done < $FILENAME

2.重定向管道

cat $FILENAME | while read LINE
do
echo $LINE
done

3.for循环

for  i  in  `cat $FILENAME`
do
echo $i
done