写法一:

----------------------------------------------------------------------------



#!/bin/bash

while read line
do
echo $line
done < file(待读取的文件)


----------------------------------------------------------------------------


写法二:

----------------------------------------------------------------------------



#!/bin/bash

cat file(待读取的文件) | while read line
do
echo $line
done


----------------------------------------------------------------------------


写法三:

----------------------------------------------------------------------------



for line in `cat file(待读取的文件)`
do
echo $line
done


----------------------------------------------------------------------------


说明:

for逐行读和while逐行读是有区别的,如:



$ cat file
aaaa
bbbb
cccc dddd

$ cat file | while read line; do echo $line; done
aaaa
bbbb
cccc dddd

$ for line in $(<file); do echo $line; done
aaaa
bbbb
cccc
dddd