Shell Script For Collecting Information on the Linux Network Configuration

by Vivek Gite on June 2, 2009

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

Tagged as: echo hostname, email, fi, get network information, kernel, linux, linux shell, network configuration, network scripts, root user, script collection, shell script

{ 13 comments… add one }

A.C. October 24, 2012, 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!
Reply Link
andrei October 25, 2010, 12:22 am
same like dustin..
Reply Link
explorer May 11, 2010, 8:47 am
i love this scrips
Reply Link
dustin December 9, 2009, 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
Reply Link
Georg October 29, 2009, 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
Reply Link
boy October 20, 2009, 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.
Reply Link
Jeff September 22, 2009, 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)”
Reply Link
abhi September 9, 2009, 10:35 pm
what a script man…..lovely….hats off to the writer….
Reply Link
Kevin Hatfield September 3, 2009, 5:10 am
Most excellent site! More FreeBSD stuff please :))
Reply Link
adhitya christiawan nurprasetyo August 3, 2009, 6:37 pm
agree! this website shared a lot of great infos :)
Reply Link
innqubus July 21, 2009, 10:03 am
Awesome script dude… Thanks a ton. This one’s so useful.
Reply Link
Susinthiran July 14, 2009, 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
Reply Link
- Vivek Gite July 14, 2009, 10:20 am
  Thanks for kind words :D
  Reply Link

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