Linux下基于端口的服务检查脚本

　　#!/bin/bash

　　#program:Usingtostudythe[if...then...fi]program

　　#dsk2007/10/83:00

　　#content:Iwillusingthisprogramtoshowyousevices

　　#1.printtheprogram''sworkinyourscreen

　　echo &Now,the service of your Linux system will be detect!&

　　echo &The www,ftp,ssh,and sendmail pop3 will be detect!&

　　echo &&

　　#2.www

　　www=`netstat -ntlp | awk '{print $4}' | grep :80$`

　　if [ &$www& != && ];

　　then

　　echo $www

　　echo &WWW is runing&

　　else

　　echo $www

　　echo &WWW is NOT runing&

　　killall -9 httpd

　　/usr/sbin/apachectl start

　　#service httpd start

　　fi

　　#3.ftp

　　ftp=`netstat -an | grep LISTEN | grep :21`

　　if [ &$ftp& != && ]; then

　　echo $ftp

　　echo &FTP is runing &

　　else

　　echo &FTP is not runing&

　　killall -9 vsftpd

　　#service vsftpd start

　　/etc/init.d/vsftpd start

　　fi

　　#4.ssh

　　ssh=`netstat -ntlp | awk '{print $4}' | grep :22$`

　　#ssh=`netstat -an | grep LISTEN | grep :22`

　　if [ &$ssh& != && ]; then

　　echo $ssh

　　echo &SSH is running&

　　else

　　echo &SSH is not running&

　　fi

　　#5.sendmail pop3

　　smtp=`netstat -an | grep LISTEN | grep :25`

　　pop3=`netstat -an | grep LISTEN | grep :110`

　　if [ &$smtp& != && ] && [ &$pop3& != && ]; then

　　echo &Send mail is OK!&

　　elif [ &$smtp& != && ] && [ &$pop3& = && ]; then

　　echo & Send mail have some problems of your pop3!&

　　elif [ &$smtp& = && ] && [ &$pop3& != && ]; then

　　echo &Send mail have so me problems of your smtp!&

　　else

　　echo &Send mail is NO Trunning!&

　　fi