Script to find available IP address Post: 302969040

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Top Forums Shell Programming and Scripting Script to find available IP address Post 302969040 by nemesis911 on Thursday 17th of March 2016 09:09:27 AM

03-17-2016

Registered User

Script to find available IP address

Hi,

I am trying to write a script that will check all used IP on the server and then print me an addressees that are not in use. Problem is in comparing two variables

Code:

#!/bin/bash

NETSTAT=$(netstat -ntp | awk '{ print $4 }' | grep -v "127.0.0.1" | cut -d ":" -f1 | grep "^[0-9]"|sort | uniq )
APACHE=$(grep -R "<VirtualHost " /etc/apache2/* | cut -d ":" -f2 | cut -d " " -f2 |  cut -d ">" -f1 | grep "^[0-9]" | sort | uniq)

USED=("${NETSTAT[@]}\n${APACHE[@]}")
IFCONFIG=$(ifconfig -a | grep -v "127.0.0.1" | grep addr | awk '{ print $2 }' | cut -d ":" -f2 | grep "\.")

???

I don't want to use diff because I want to use loop which will give me better output

Last edited by nemesis911; 03-17-2016 at 10:37 AM.. Reason: ops sorry...didn't edit it.

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LEARN ABOUT ULTRIX

zgrep

ZGREP(1)						      General Commands Manual							  ZGREP(1)

NAME

       zgrep - search possibly compressed files for a regular expression

SYNOPSIS

       zgrep [ grep_options ] [ -e ] pattern filename...

DESCRIPTION

       Zgrep  invokes  grep  on  compressed  or  gzipped  files.   These  grep	options  will  cause  zgrep  to  terminate  with  an  error  code:
       (-[drRzZ]|--di*|--exc*|--inc*|--rec*|--nu*).  All other options specified are passed directly to grep.  If no file is specified,  then  the
       standard input is decompressed if necessary and fed to grep.  Otherwise the given files are uncompressed if necessary and fed to grep.

       If the GREP environment variable is set, zgrep uses it as the grep program to be invoked.

EXIT CODE

       2 - An option that is not supported was specified.

AUTHOR

       Charles Levert (charles@comm.polymtl.ca)

SEE ALSO

       grep(1), gzexe(1), gzip(1), zdiff(1), zforce(1), zmore(1), znew(1)

																	  ZGREP(1)

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