Shell Script For Collecting Information on the Linux Network Configuration

This shell script is tested under CentOS / RHEL and Fedora Linux. It should also work under other Linux distributions. If you would like to collect and submit information on your network configuration to your sr. Linux / UNIX admin use this script.

#!/bin/bash
# A Linux Shell script to collect information on your network configuration.
# -------------------------------------------------------------------------
# Copyright (c) 2003 nixCraft project <http://cyberciti.biz/fb/>
# This script is licensed under GNU GPL version 2.0 or above
# -------------------------------------------------------------------------
# This script is part of nixCraft shell script collection (NSSC)
# Visit http://bash.cyberciti.biz/ for more information.
# -------------------------------------------------------------------------
# Last updated: Jun-03-2009
# -------------------------------------------------------------------------
HWINF=/usr/sbin/hwinfo
IFCFG=/sbin/ifconfig
IP4FW=/sbin/iptables
IP6FW=/sbin/ip6tables
LSPCI=/sbin/lspci
ROUTE=/sbin/route
NETSTAT=/bin/netstat
LSB=/usr/bin/lsb_release

## files ##
DNSCLIENT="/etc/resolv.conf"
DRVCONF="/etc/modprobe.conf"
NETALIASCFC="/etc/sysconfig/network-scripts/ifcfg-eth?-range?"
NETCFC="/etc/sysconfig/network-scripts/ifcfg-eth?"
NETSTATICROUTECFC="/etc/sysconfig/network-scripts/route-eth?"
SYSCTL="/etc/sysctl.conf"

## Output file ##
OUTPUT="network.$(date +'%d-%m-%y').info.txt"

## Email info to?? ##
SUPPORT_ID="you@example.com"

chk_root(){
	local meid=$(id -u)
	if [ $meid -ne 0 ];
	then
		echo "You must be root user to run this tool"
		exit 999
	fi
}

write_header(){
	echo "---------------------------------------------------" >> $OUTPUT
	echo "$@" >> $OUTPUT
	echo "---------------------------------------------------"  >> $OUTPUT
}


dump_info(){
	echo "* Hostname: $(hostname)" >$OUTPUT
	echo "* Run date and time: $(date)" >>$OUTPUT

	write_header "Linux Distro"
	echo "Linux kernel: $(uname -mrs)" >>$OUTPUT
	$LSB -a >> $OUTPUT	

	[ -x ${HWINF} ] && write_header "${HWINF} --network_ctrl"
	[ -x ${HWINF} ] && ${HWINF} --network_ctrl >> $OUTPUT

	[ -x ${HWINF} ] && write_header "${HWINF} --isapnp"
	[ -x ${HWINF} ] && ${HWINF} --isapnp >> $OUTPUT

	write_header "PCI Devices"
	${LSPCI} -v >> $OUTPUT

	write_header "$IFCFG Output"
	$IFCFG >> $OUTPUT

	write_header "Kernel Routing Table"
	$ROUTE -n >> $OUTPUT

	write_header "Network Card Drivers Configuration $DRVCONF"
	[ -f $DRVCONF ] && grep eth $DRVCONF  >> $OUTPUT || echo "Error $DRVCONF file not found."  >> $OUTPUT
		
	write_header "DNS Client $DNSCLIENT Configuration"
	[ -f $DNSCLIENT ] && cat $DNSCLIENT >> $OUTPUT || echo "Error $DNSCLIENT file not found." >> $OUTPUT

	write_header "Network Configuration File"
	for f in $NETCFC
	do
		if [ -f $f ]
		then
			echo "** $f **" >> $OUTPUT
			cat $f >> $OUTPUT
		else
			echo "Error $f not found." >> $OUTPUT
		fi
	done 

	write_header "Network Aliase File"
	for f in $NETALIASCFC
	do
		if [ -f $f ]
		then
			echo "** $f **" >> $OUTPUT
			cat $f >> $OUTPUT
		else
			echo "Error $f not found." >> $OUTPUT
		fi
	done 


	write_header "Network Static Routing Configuration"
	for f in $NETSTATICROUTECFC
	do
		if [ -f $f ]
		then
			echo "** $f **" >> $OUTPUT
			cat $f >> $OUTPUT
		else
			echo "Error $f not found." >> $OUTPUT
		fi
	done 

	write_header "IP4 Firewall Configuration"
	$IP4FW -L -n >> $OUTPUT

	write_header "IP6 Firewall Configuration"
	$IP6FW -L -n  >> $OUTPUT

	write_header "Network Stats"
	$NETSTAT -s >> $OUTPUT

	write_header "Network Tweaks via $SYSCTL"
	[ -f $SYSCTL ] && cat $SYSCTL >> $OUTPUT || echo "Error $SYSCTL not found." >>$OUTPUT

	echo "The Network Configuration Info Written To $OUTPUT. Please email this file to $SUPPORT_ID."
}

chk_root
dump_info

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#!/bin/bash

# A Linux Shell script to collect information on your network configuration.

# -------------------------------------------------------------------------

# This script is licensed under GNU GPL version 2.0 or above

# -------------------------------------------------------------------------

# This script is part of nixCraft shell script collection (NSSC)

# Visit http://bash.cyberciti.biz/ for more information.

# -------------------------------------------------------------------------

# Last updated: Jun-03-2009

# -------------------------------------------------------------------------

HWINF=/usr/sbin/hwinfo

IFCFG=/sbin/ifconfig

IP4FW=/sbin/iptables

IP6FW=/sbin/ip6tables

LSPCI=/sbin/lspci

ROUTE=/sbin/route

NETSTAT=/bin/netstat

LSB=/usr/bin/lsb_release

## files ##

DNSCLIENT="/etc/resolv.conf"

DRVCONF="/etc/modprobe.conf"

NETALIASCFC="/etc/sysconfig/network-scripts/ifcfg-eth?-range?"

NETCFC="/etc/sysconfig/network-scripts/ifcfg-eth?"

NETSTATICROUTECFC="/etc/sysconfig/network-scripts/route-eth?"

SYSCTL="/etc/sysctl.conf"

## Output file ##

OUTPUT="network.$(date +'%d-%m-%y').info.txt"

## Email info to?? ##

SUPPORT_ID="you@example.com"

chk_root(){

local meid=$(id -u)

if [ $meid -ne 0 ];

then

echo "You must be root user to run this tool"

exit 999

}

write_header(){

echo "---------------------------------------------------" >> $OUTPUT

echo "$@" >> $OUTPUT

echo "---------------------------------------------------" >> $OUTPUT

}

dump_info(){

echo "* Hostname: $(hostname)" >$OUTPUT

echo "* Run date and time: $(date)" >>$OUTPUT

write_header "Linux Distro"

echo "Linux kernel: $(uname -mrs)" >>$OUTPUT

$LSB -a >> $OUTPUT

[ -x ${HWINF} ] && write_header "${HWINF} --network_ctrl"

[ -x ${HWINF} ] && ${HWINF} --network_ctrl >> $OUTPUT

[ -x ${HWINF} ] && write_header "${HWINF} --isapnp"

[ -x ${HWINF} ] && ${HWINF} --isapnp >> $OUTPUT

write_header "PCI Devices"

${LSPCI} -v >> $OUTPUT

write_header "$IFCFG Output"

$IFCFG >> $OUTPUT

write_header "Kernel Routing Table"

$ROUTE -n >> $OUTPUT

write_header "Network Card Drivers Configuration $DRVCONF"

[ -f $DRVCONF ] && grep eth $DRVCONF >> $OUTPUT || echo "Error $DRVCONF file not found." >> $OUTPUT

write_header "DNS Client $DNSCLIENT Configuration"

[ -f $DNSCLIENT ] && cat $DNSCLIENT >> $OUTPUT || echo "Error $DNSCLIENT file not found." >> $OUTPUT

write_header "Network Configuration File"

for f in $NETCFC

if [ -f $f ]

then

echo "** $f **" >> $OUTPUT

cat $f >> $OUTPUT

else

echo "Error $f not found." >> $OUTPUT

done

write_header "Network Aliase File"

for f in $NETALIASCFC

if [ -f $f ]

then

echo "** $f **" >> $OUTPUT

cat $f >> $OUTPUT

else

echo "Error $f not found." >> $OUTPUT

done

write_header "Network Static Routing Configuration"

for f in $NETSTATICROUTECFC

if [ -f $f ]

then

echo "** $f **" >> $OUTPUT

cat $f >> $OUTPUT

else

echo "Error $f not found." >> $OUTPUT

done

write_header "IP4 Firewall Configuration"

$IP4FW -L -n >> $OUTPUT

write_header "IP6 Firewall Configuration"

$IP6FW -L -n >> $OUTPUT

write_header "Network Stats"

$NETSTAT -s >> $OUTPUT

write_header "Network Tweaks via $SYSCTL"

[ -f $SYSCTL ] && cat $SYSCTL >> $OUTPUT || echo "Error $SYSCTL not found." >>$OUTPUT

echo "The Network Configuration Info Written To $OUTPUT. Please email this file to $SUPPORT_ID."

}

chk_root

dump_info

13 comment

A.C. says:
October 24, 2012 at 7:25 am
Thanks for the great scripts… I’m currently trying to up my skills on shell programming and these are extremely useful and very cleanly written. Please keep them coming!
andrei says:
October 25, 2010 at 12:22 am
same like dustin..
explorer says:
May 11, 2010 at 8:47 am
i love this scrips
dustin says:
December 9, 2009 at 12:19 am
I recieved this when running the script,,,,,The Network Configuration Info Written To network.08-12-09.info.txt. Please email this file to
im using Centos 5.3
Georg says:
October 29, 2009 at 1:55 pm
Hi.
This is a very good script. I modified it, because i needed an output of “dmidecode”. I thought it’s useful…
Georg
boy says:
October 20, 2009 at 7:11 am
good day,vivek.
I am currently developing a project that is similar to ftp by using shell script.In my project,I try to implement one replication technique called Read-One-Write-All (ROWA).Do you have any idea how to develop the sourcecode or if possible,any similar project that I could refer to.
Thank you.
Jeff says:
September 22, 2009 at 11:30 am
This a great script!!!
I but one more line, to send email
cat “$OUTPUT” | mail $SUPPORT_ID -s “The Network Configuration Info $(hostname)”
abhi says:
September 9, 2009 at 10:35 pm
what a script man…..lovely….hats off to the writer….
Kevin Hatfield says:
September 3, 2009 at 5:10 am
Most excellent site! More FreeBSD stuff please :))
adhitya christiawan nurprasetyo says:
August 3, 2009 at 6:37 pm
agree! this website shared a lot of great infos :)
innqubus says:
July 21, 2009 at 10:03 am
Awesome script dude… Thanks a ton. This one’s so useful.
Susinthiran says:
July 14, 2009 at 9:47 am
Hi, Vivek.
Just wanted to say i like reading your articles and other info on this site.
You and Dag Weeirs are the super gurus of RHEL/CentOS that i know about :)))
B.R
Susinthiran
Oslo/Norway
1. Vivek Gite says:
  July 14, 2009 at 10:20 am
  Thanks for kind words :D

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13 comment