shell 按行循环读入文件方法,shell循环读入文件

shell 按行循环读入文件方法,shell循环读入文件

linux shell 按行循环读入文件常用代码如下：

#/bin/bash

printf "*************************************n"

echo " cat file whiel read line"

cat test.txt |while read line

do

echo $line;

done

printf "*************************************n"

echo "while read line <file"

while read line

do

echo $line;

done <test.txt

printf "*************************************n"

echo "for line in cat test.txt"

SAVEIFS=$IFS

IFS=$(echo -en "n")

for line in $(cat test.txt)

do

echo $line;

done

IFS=$SAVEIFS

注意：for line in $(cat test.txt) 当文件中有空格或者tab 时，一定要设置一下IFS变量。