监控一个服务端口

[[email protected] jao]# cat monitor_prot.sh 
#!/bin/bash
prot_status(){
temp_file=`mktemp prot_status.XXX`

# 1、判断telnet命令是否存在
[ ! -x /usr/bin/telnet ] && echo "telnet: not found comand" && exit 1
 

# 2、测试端口 $1:IP地址  $2:端口号
( telnet $1 $2 <<EOF
quit
EOF
 ) &> $temp_file

# 3、分析文件中内容 判断结果

if egrep "\^]" $temp_file &>/dev/null;then
    echo "$1 $2 open"
else
    echo "$1 $2 down"
fi

rm -f $temp_file
}
prot_status $1 $2

//拿本机80端口做测试

[[email protected] jao]# netstat -anput | grep 80
tcp        0      0 0.0.0.0:80              0.0.0.0:*               LISTEN      1058/nginx: master  
tcp        0      0 10.10.14.10:80          10.10.14.10:45684       TIME_WAIT   -                   
tcp        0      0 10.10.14.10:45682       10.10.14.10:80          TIME_WAIT   -                   
[[email protected] jao]# bash monitor_prot.sh 10.10.14.10 80
10.10.14.10 80 open