以检测WWW,ftp,ssh,sendmail + pop3服务是否开启

转自：http://hi.baidu.com/richardlee007/blog/item/fab7a145f832a422cefca377.html

这个小脚本可以检测WWW,ftp,ssh,sendmail + pop3服务是否开启：

#!/bin/bash

#program: Using to study the [ if ... then ... fi ] program

#dsk 2007/10/8 3:00

#content: I will using this program to show you sevices

#1. print the program's work in your screen

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 -an|grep LISTEN|grep :80'

if [ "$www" != "" ]; then

echo "WWW is runing"

else

echo "WWW is NOT runing"

fi

#3. ftp

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

if [ "$ftp" != "" ]; then

echo "FTP is runing"

else

echo "FTP is not runing"

fi

#4. ssh

ssh='netstat -an|grep LISTEN|grep :22'

if [ "$ssh" != "" ];then

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 "Sendmail is OK!"

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

echo "Sendmail have some problems of your pop3!"

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

echo "Sendmail have some problems of your smtp!"

else

echo "Sendmail is NOT running!"

fi