Port-based service check script in Linux

Article Title: Port-based service check script in Linux. Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source.

#! /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: 8080'

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