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

 

== 实践 === 

#! bin/sh

 

#$str='http://images.stylight.de/static/res200/s2870/2870657.1.jpg '

#echo ${str##*fo}

#echo ${str#fo}

while read line

do

   wget -p ${line:0:59}

done < '/root/mysql/mysql.log';