Shell tests whether a website has opened port 80

1: curl (1 to view the http return status)

webStatus=`curl -I -s http://www.baidu.cc|grep 200|wc -l`
[ $webStatus -eq 1 ] && echo "running" || echo "not running"
//or
httpHeader=`curl -s -I http://www.baidu.cc|sed -n '1p'|cut -d " " -f2`
[ $httpHeader == 200 ] && echo "running" ||"not running"  

2: curl (2 to see if the command was executed successfully)

curl -s http://www.baidu.com >&/dev/null
[ $? -eq 0 ] && echo "running" ||echo "not running"

 3：telnet

echo -e "\n"|telnet www.baidu.com 80|grep Connected|wc -l
Returning 1 means it is enabled

 4：nc

nc -w 5 .www.baidu.com 80 && echo "running" || "not running"

 5: Finally, paste an example of dynamically setting ip and port

[root@linhexiao shellTest]# cat check_web1.6.sh
#!/bin/bash
#create by linhexiao
#V1.6

[ -f /etc/init.d/functions ] && . /etc/init.d/functions||exit 1
if [ $# -ne 2 ];then
	 echo "Usage:$0 ip port"
	 exit 1
be

httpPortNum=`nmap $1 -p $2|grep open|wc -l`

if [ $httpPortNum == 1 ];then
	action "$1 $2 is running " /bin/true;
else
	action "$1 $2 not running " /bin/false;
be