方便的查到webserver的响应时间！
安装
[root@selboo opt]# wget -c http://www.vanheusden.com/httping/httping-1.3.1.tgz
[root@selboo opt]# tar zxvf httping-1.3.1.tgz
[root@selboo opt]# cd httping-1.3.1
[root@selboo httping-1.3.1]# make install
使用
[root@selboo httping-1.3.1]# httping http://selboo.com.cn
PING selboo.com.cn:80 (http://selboo.com.cn):
connected to selboo.com.cn:80, seq=0 time=69.75 ms
connected to selboo.com.cn:80, seq=1 time=44.59 ms
connected to selboo.com.cn:80, seq=2 time=44.00 ms
connected to selboo.com.cn:80, seq=3 time=43.51 ms
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