把所有html,htm.shtml文件内容全改成小写

#!/bin/bash
### create time :20080804
### author      :huangxifeng
### description :1.查找所有html,htm,shtml文件类型的文件，保存至file.txt

###              2.把文件的内容全部改为小写
find /var/www/html -name *.htm >> file.txt
find /var/www/html -name *.html >> file.txt
find /var/www/html -name *.shtml >> file.txt

for i in `cat file.txt`
do
sed 'y/ABCDEFGHIJKLMNOPQRSTUVWXYZ/abcdefghijklmnopqrstuvwxyz/' $i > $i.lower;
rm -f $i;
mv $i.lower $i;
done