本文原創於：http://www.cnblogs.com/iloveyoucc/archive/2012/07/10/2585529.html
shell:讀取文件的每一行內容並輸出
寫法一：
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#!/bin/bash
while read line
do
echo $line
done < file(待讀取的文件)
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寫法二：
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#!/bin/bash
cat file(待讀取的文件) | while read line
do
echo $line
done
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寫法三：
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for line in `cat file(待讀取的文件)`
do
echo $line
done
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說明：
for逐行讀和while逐行讀是有區別的,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 $line; done
aaaa
bbbb
cccc
dddd
== 實踐 ===
#! bin/sh
#$str='http://p_w_picpaths.stylight.de/static/res200/s2870/2870657.1.jpg%0D'
#echo ${str##*fo}
#echo ${str#fo}
while read line
do
wget -p ${line:0:59}
done < '/root/mysql/mysql.log';