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==========================Debian=====================================
cat checkurl.sh 
#!/bin/bash
#--------------------------------------------------
# Date:2015-05-04
# Author:jimmygong
# Mail:[email protected]
# Function:check website(curl)
# Version:1.0
#--------------------------------------------------
set -o nounset
echosucc () 
{
    succstatus="[ Ok ]"
    printf "\033[32m $succstatus $* \033[0m\n"
}
echofail () 
{ 
    failstatus="[ Failure ]"
    printf "\033[31m $failstatus $* \033[0m\n"
    exit 1
}
urllist=(
http://7938217.blog.51cto.com/7928217/1639520
http://7938217.blog.51cto.com/7928217/1639753
http://7938217.blog.51cto.com/7928217/1641646
http://7938217.blog.51cto.com/7928217/1641803
http://7938217.blog.51cto.com/
http://oldboy.blog.51cto.com
http://etiantian.org
10.1.1.1
)

function checkwait () 
{
    echo -n "start check url."
    for ((i=0;i<3;i++))
    do
        echo -n ".";sleep 1
    done
    echo
}
function checkurl () 
{
    checkwait
    cat /etc/issue|head -1
    for ((i=0;i<${#urllist[*]};i++))
    do
        status=`curl -o /dev/null -s -m 10 --connect-timeout 15 -w "%{http_code}\n" ${urllist[$i]}`
        if [[ $status == '200' ]]
        wget -T 15 --tries=1 --spider ${urllist[$i]} > /dev/null 2>&1
        [[ $? -eq 0 ]]
        then
            echosucc ${urllist[$i]}
        else
            echofail ${urllist[$i]}
        fi
    done
}

checkurl
exit 0
============================说明===============================
执行结果
bash checkurl.sh 
start check url....
Debian GNU/Linux 6.0 \n \l
 [ Ok ] http://7938217.blog.51cto.com/7928217/1639520 
 [ Ok ] http://7938217.blog.51cto.com/7928217/1639753 
 [ Ok ] http://7938217.blog.51cto.com/7928217/1641646 
 [ Ok ] http://7938217.blog.51cto.com/7928217/1641803 
 [ Ok ] http://7938217.blog.51cto.com/ 
 [ Ok ] http://oldboy.blog.51cto.com 
 [ Ok ] http://etiantian.org 
 [ Failure ] 10.1.1.1

-m/--max-time  设置最大传输时间
-s/--silent静音模式。不输出任何东西
-o/--output 把输出写到该文件中
-w/--write-out [format]什么输出完成后
--connect-timeout  设置最大请求时间

===========================Centos=====================================
cat checkurl.sh 
#!/bin/bash
#--------------------------------------------------
# Date:2015-05-04
# Author:jimmygong
# Mail:[email protected]
# Function:check website(curl)
# Version:1.0
#--------------------------------------------------
set -o nounset
source /etc/init.d/functions
urllist=(
http://7938217.blog.51cto.com/7928217/1639520
http://7938217.blog.51cto.com/7928217/1639753
http://7938217.blog.51cto.com/7928217/1641646
http://7938217.blog.51cto.com/7928217/1641803
http://7938217.blog.51cto.com/
http://oldboy.blog.51cto.com
http://etiantian.org
10.1.1.1
)

function checkwait () 
{
    echo -n "start check url."
    for ((i=0;i<3;i++))
    do
        echo -n ".";sleep 1
    done
    echo
}
function checkurl () 
{
    checkwait
    cat /etc/issue|head -1
    for ((i=0;i<${#urllist[*]};i++))
    do
        status=`curl -o /dev/null -s -m 10 --connect-timeout 15 -w "%{http_code}\n" ${urllist[$i]}`
        if [[ $status == '200' ]]
        wget -T 15 --tries=1 --spider ${urllist[$i]} > /dev/null 2>&1
        [[ $? -eq 0 ]]
        then
            action ${urllist[$i]} /bin/true
        else
            action ${urllist[$i]} /bin/false
        fi
    done
}

checkurl
exit 0
=================================说明==============================
执行结果
bash checkurl.sh 
start check url....
CentOS release 6.6 (Final)
http://7938217.blog.51cto.com/7928217/1639520              [  OK  ]
http://7938217.blog.51cto.com/7928217/1639753              [  OK  ]
http://7938217.blog.51cto.com/7928217/1641646              [  OK  ]
http://7938217.blog.51cto.com/7928217/1641803              [  OK  ]
http://7938217.blog.51cto.com/                             [  OK  ]
http://oldboy.blog.51cto.com                               [  OK  ]
http://etiantian.org                                       [  OK  ]
10.1.1.1                                                   [FAILED]