shell脚本读取文件无法读入tab的解决方案。主要表现是读取到的行，没有了tab。

即使用 read line无法读入tab。

解决方法：

#!/bin/bash
# A shell script to read file line by line
 
filename="/var/log/xyz.log"
 
while IFS= read -r line
do
    # $line variable contains current line read from the file
    # display $line text on the screen or do something with it.
 
    echo "$line"
done < $filename

方法2：

#!/bin/bash
IFS=$'\n'
for line in $(cat ./Survey.txt)
do
   echo $line
done