使用shell统计出出现次数排名top10的网址

#!/bin/sh

foo()
{
if [ $# -ne 1 ];
then
echo "Usage:$0 filename";
exit -1
fi

egrep -o "http://[a-zA-Z0-9.]+\.[a-zA-Z]{2,3}" website | awk '{ count[$0]++ } END { printf("%-30s %s\n","wensite","count"); for(ind in count) { printf("%-30s %d\n",ind,count[ind]); } }' | sort -nrk 2 | head -n 10 >websorted2.txt;

}

foo website

例子：

文件website中的内容：
http://www.google.com http://www.baidu.com http://www.sina.com http://www.bjtu.edu.cn http://www.codeproject.com http://www.csdn.com http://www.sohu.com http://www.yahoo.com http://mail.163.com http://www.bjtu.edu.cn http://www.codeproject.com http://www.csdn.com http://www.sohu.com http://www.yahoo.com http://mail.163.com http://www.codeproject.com http://www.csdn.com http://www.sohu.com http://www.yahoo.com http://mail.163.com http://www.qq.com http://www.hao123.com http://www.163.com http://youku.com http://taobao/com http://www.bjtu.edu.cn http://www.codeproject.com http://www.csdn.com http://www.sohu.com http://www.yahoo.com http://mail.163.com http://www.codeproject.com http://www.csdn.com http://www.sohu.com http://www.yahoo.com http://mail.163.com http://www.qq.com http://www.hao123.com http://www.163.com http://youku.com http://taobao/com
生成的文件内容为（即结果）
http://www.yahoo.com 5
http://www.sohu.com 5
http://www.csdn.com 5
http://www.codeproject.com 5
http://mail.163.com 5
http://www.bjtu.edu.cn 3
http://youku.com 2
http://www.qq.com 2
http://www.hao123.com 2
http://www.163.com 2