Linux shell 批量验证端口连通性

工作中会遇到验证到某某服务器端口是否连通，如果IP或端口多时,用shell还是很省时省力的,看下面的脚本:

#!/bin/bash
#
#database check
#set -o nounset
LOCALIP=`ifconfig | grep inet | head - | awk '{print $2}' | sed 's/addr\://'`
IPLIST='192.168.161.234
192.168.161.235
192.168.161.22
'
PORTLIST='1521 1522 1523 1524 1525 1526 1527 1528 1529 1530'
check_nc(){
for CHECK_IP in $IPLIST
do
    for CHECK_PORT in $PORTLIST
        do
            nc -nz -w  $CHECK_IP $CHECK_PORT
            if [ $? -eq  ];then
                echo "$LOCALIP result $CHECK_IP $CHECK_PORT Connected"
            else
                echo "$LOCALIP result $CHECK_IP $CHECK_PORT Noconnected"
            fi
        done
done
}
check_nc_7(){
for CHECK_IP in $IPLIST
do
    for CHECK_PORT in $PORTLIST
        do
            nc -n -w  $CHECK_IP $CHECK_PORT < /dev/null
            if [ $? -eq  ];then
                echo "$LOCALIP result $CHECK_IP $CHECK_PORT Connected"
            else
                echo "$LOCALIP result $CHECK_IP $CHECK_PORT Noconnected"
            fi
        done
done
}
check_telnet(){
for CHECK_IP in $IPLIST
do
    for CHECK_PORT in $PORTLIST
        do
            echo  -e  "\n"| telnet $CHECK_IP $CHECK_PORT | grep Connected
            if [ $? -eq  ];then
                echo "$LOCALIP result $CHECK_IP $CHECK_PORT Noconnected"
            else
                echo "$LOCALIP result $CHECK_IP $CHECK_PORT Connected"
            fi
        done
done
}
echo "--------------------------------------"
echo "execution time : `date`"
echo "--------------------------------------"
echo "Home ip : $LOCALIP"
echo "--------------------------------------"
which nc > /dev/null
if [ $? -eq  ];then
    echo "------------------nc------------------"
    echo "--------------------------------------"
    cat /etc/redhat-release |grep 'release 7' > /dev/null
    if [ $? -eq  ];then
        check_nc_7
    else
        check_nc
    fi
else
    which telnet > /dev/null
    if [ $? -eq  ];then
        echo "-----------------telnet----------------"
        check_telnet
    fi
fi

此脚本考虑了nc及telnet命令,及nc在redhat 7中应用的不同。可以直接复制使用,只要修改一下IP和端口。