gnu gpl version – nixCraft

Shell Script To Build dnstop Utility To Displays Various Tables Of DNS Server Traffic

in Software Build Scripts last updated March 5, 2010

A shell script to build dnstop utility to displays various tables of DNS traffic on your network including bind 9 server stats under RHEL / Fedora / CentOS / Redhat Linux.

Nginx Shell Script To Block Spamhaus Lasso Drop Spam IP Address

in Web Server last updated January 10, 2010

A Nginx Shell Script To Block Spamhaus Lasso Drop Spam IP Address. Run this script once a day and drop all spam network IPs with http 403 error. The script will get executed every day via /etc/cron.daily (make sure crond is running).

Shell Script To Add MySQL Database, Username and Password Including Remote Host Access

in MySQL last updated January 9, 2010

A sample shell script to add mysql database, username and password. t can also grant remote access on fly while creating the database.

Shell Script To Update Remote RHEL and CentOS Servers Over SSH Session

in Automation & Management last updated January 8, 2010

A simply shell script to update all Redhat Enterprise Linux 5 / CentOS Linux 5 servers. You must have ssh public and private key installed.The last example shows how to login as a normal user and run sudo to update the same. This will save a lot of time if you’ve 5-7 servers patch when RHN releases updates.

Shell Script To Remove All Keys Belonging To Hostname From a ~/.known_hosts File

in File-management last updated December 14, 2009

A simple shell script to clean (delete) ~/.known_hosts file hostname entry.

Shell script to generate random files using RANDOM variable

in Tempfile last updated April 10, 2008

#!/bin/bash
# Shell script to generate random file method # 1 
#
# This is a free shell script under GNU GPL version 2.0 or above
#
# Copyright (C) 2005 nixCraft
#
# Feedback/comment/suggestions : http://cyberciti.biz/fb/

echo "List of temporary files : "
for i  in 1 2 3 4 5
do
   FILE="/tmp/$(basename $0).$RANDOM.txt"
   echo $FILE # show file name
   > $FILE # create files
done

#!/bin/bash

# Shell script to generate random file method # 1

# This is a free shell script under GNU GPL version 2.0 or above

# Feedback/comment/suggestions : http://cyberciti.biz/fb/

echo "List of temporary files : "

for i in 1 2 3 4 5

FILE="/tmp/$(basename $0).$RANDOM.txt"

echo $FILE # show file name

> $FILE # create files

done

Shell Script to stop DLink PCI wireless lan card DWL 520 (Debian Linux)

in Script last updated April 10, 2008

#!/bin/sh
# Script to stop DLink PCL wireless lan card DWL 520
# ----------------------------------------------------------------
# Copyright (c) 2006 nixCraft <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.
# See url for more info:
# https://www.cyberciti.biz/tips/linux-install-and-configure-dlink-dwl-g-520-wireless-lan-pci-card.html
# -------------------------------------------------------------------------

# unload driver (DLink 520/rt61)
rmmod rt61

#clear firwall
iptables -F
iptables -X
iptables -t nat -F
iptables -t nat -X
iptables -t mangle -F
iptables -t mangle -X

# append your other stuff below

#!/bin/sh

# Script to stop DLink PCL wireless lan card DWL 520

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

# 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.

# See url for more info:

# https://www.cyberciti.biz/tips/linux-install-and-configure-dlink-dwl-g-520-wireless-lan-pci-card.html

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

# unload driver (DLink 520/rt61)

rmmod rt61

#clear firwall

iptables -F

iptables -X

iptables -t nat -F

iptables -t nat -X

iptables -t mangle -F

iptables -t mangle -X

# append your other stuff below

Shell script to get uptime, disk , cpu , RAM , system load, from multiple Linux servers – output the information on a single server in html format

in Monitoring last updated April 10, 2008

Shell script to get uptime, disk usage, cpu usage, RAM usage, system load, etc; from multiple Linux servers and output the information on a single server in html format

#!/bin/bash
# Shell script to get uptime, disk usage, cpu usage, RAM usage,system load,etc. 
# from multiple Linux servers and output the information on a single server 
# in html format. Read below for usage/installation info
# *---------------------------------------------------------------------------*
# * dig_remote_linux_server_information.bash,v0.1, last updated on 25-Jul-2005*
# * Copyright (c) 2005 nixCraft project                                       *
# * Comment/bugs: http://cyberciti.biz/fb/                                    *
# * Ref url: http://cyberciti.biz/nixcraft/forum/viewtopic.php?t=97           *
# * This script is licensed under GNU GPL version 2.0 or above                *
# *---------------------------------------------------------------------------*
# *  Installation Info                                                        *
# ----------------------------------------------------------------------------*
# You need to setup ssh-keys to avoid password prompt, see url how-to setup 
# ssh-keys:
# cyberciti.biz/nixcraft/vivek/blogger/2004/05/ssh-public-key-based-authentication.html
# 
# [1] You need to setup correct VARIABLES script:
#
# (a) Change Q_HOST to query your host to get information
# Q_HOST="192.168.1.2 127.0.0.1 192.168.1.2"
#
# (b) Setup USR, who is used to connect via ssh and already setup to connect 
# via ssh-keys
# USR="nixcraft"
#
# (c)Show warning if server load average is below the limit for last 5 minute.
# setup LOAD_WARN as per your need, default is 5.0
#
# LOAD_WARN=5.0
#
# (d) Setup your network title using MYNETINFO
# MYNETINFO="My Network Info"
#
# (e) Save the file 
#
# Please refer to forum topic on this script: 
# Also download the .gif files and put them in your output dir
#
# ----------------------------------------------------------------------------
# Execute script as follows (and copy .gif file in this dir) :
# this.script.name > /var/www/html/info.html
# ============================================================================
# This script is part of nixCraft shell script collection (NSSC)
# Visit http://bash.cyberciti.biz/ for more information.
# -------------------------------------------------------------------------

# SSH SERVER HOST IPS, setup me 
# Change this to query your host
Q_HOST="192.168.1.2 127.0.0.1 192.168.1.2"

# SSH USER, change me
USR="nixcraft"

# Show warning if server load average is below the limit for last 5 minute
LOAD_WARN=5.0

# Your network info
MYNETINFO="My Network Info"
#
# if it  is run as cgi we can do reload stuff too :D
PBY='Powered by <a href="http://cyberciti.biz/download/">script</a>'


# font colours
GREEN='<font color="#00ff00">'
RED='<font color="#ff0000">'
NOC='</font>'
LSTART='<ul><li>'
LEND='</li></ul>'
# Local path to ssh and other bins
SSH="/usr/bin/ssh"
PING="/bin/ping"
NOW="$(date)"

## functions ##
writeHead(){
 echo '<HTML><HEAD><TITLE>Network Status</TITLE></HEAD>
 <BODY alink="#0066ff" bgcolor="#000000" link="#0000ff" text="#ccddee" vlink="#0033ff">'
 echo '<CENTER><H1>'
 echo "$MYNETINFO</H1>"
 echo "Generated on $NOW"
 echo '</CENTER>'
 
}

writeFoot(){
 echo "<HR><center>$PBY</center>"
  echo "</BODY></HTML>"
}

## main ##

writeHead
echo '<TABLE WIDTH=100% BORDER=2 BORDERCOLOR="#000080" CELLPADDING=4 CELLSPACING=4 FRAME=HSIDES RULES=NONE" >'
echo '<TR VALIGN=TOP>'
for host in $Q_HOST
do
  #echo '<TD WIDTH=33% BGCOLOR="#0099ff">'
  echo '<TD BGCOLOR="#0099ff">'
  _CMD="$SSH $USR@$host"
  rhostname="$($_CMD hostname)"
  
  ruptime="$($_CMD uptime)"
  if $(echo $ruptime | grep -E "min|days" >/dev/null); then
    x=$(echo $ruptime | awk '{ print $3 $4}')
  else
    x=$(echo $ruptime | sed s/,//g| awk '{ print $3 " (hh:mm)"}')
  fi
  ruptime="$x"
      
  rload="$($_CMD uptime |awk -F'average:' '{ print $2}')"
  x="$(echo $rload | sed s/,//g | awk '{ print $2}')"
  y="$(echo "$x >= $LOAD_WARN" | bc)"
  [ "$y" == "1" ] && rload="$RED $rload (High) $NOC" || rload="$GREEN $rload (Ok) $NOC"
  
  rclock="$($_CMD date +"%r")"
  rtotalprocess="$($_CMD ps axue | grep -vE "^USER|grep|ps" | wc -l)"
  rfs="$($_CMD df -hT | grep -vE "^Filesystem|shm" \
  | awk 'BEGIN{print "<ul>"}{w=sprintf("%d",$6);print "<li>" $7 \
  "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;" $6 \
  "(" $2 ")<BR> <img src=\"indicator.gif\" height=\"4\" width=\"" w "\"> \
  <BR><img src=\"graph.gif\"> \
  <BR>" $4"/"$3 "</li>"}END{ print "</ul>"}')"

  rusedram="$($_CMD free -mto | grep Mem: | awk '{ print $3 " MB" }')"
  rfreeram="$($_CMD free -mto | grep Mem: | awk '{ print $4 " MB" }')"
  rtotalram="$($_CMD free -mto | grep Mem: | awk '{ print $2 " MB" }')"

  $PING -c1  $host>/dev/null
  if [ "$?" != "0" ] ; then
    rping="$RED Failed $NOC"   
  else
    rping="$GREEN Ok $NOC"
    echo "<b><u>$rhostname</u></b><BR>" 
    echo "Ping status: $rping<BR>"
    echo "Time: $rclock<BR>"
    echo "Uptime: $ruptime <BR>"
    echo "Load avarage: $LSTART $rload $LEND"
    echo "Total running process: $LSTART $rtotalprocess $LEND"
    echo "Disk status:"
    echo "$rfs"
    echo "Ram/swap status:<ul>" 
    echo "<li>Used RAM: $rusedram</li>" 
    echo "<li>Free RAM: $rfreeram</li>"
    echo "<li>Total RAM: $rtotalram </li></ul>"
  fi   
  
  echo "</td>"
done  
  echo "</tr></table>"
writeFoot

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#!/bin/bash

# Shell script to get uptime, disk usage, cpu usage, RAM usage,system load,etc.

# from multiple Linux servers and output the information on a single server

# in html format. Read below for usage/installation info

# *---------------------------------------------------------------------------*

# * dig_remote_linux_server_information.bash,v0.1, last updated on 25-Jul-2005*

# * Comment/bugs: http://cyberciti.biz/fb/ *

# * Ref url: http://cyberciti.biz/nixcraft/forum/viewtopic.php?t=97 *

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

# *---------------------------------------------------------------------------*

# * Installation Info *

# ----------------------------------------------------------------------------*

# You need to setup ssh-keys to avoid password prompt, see url how-to setup

# ssh-keys:

# cyberciti.biz/nixcraft/vivek/blogger/2004/05/ssh-public-key-based-authentication.html

# [1] You need to setup correct VARIABLES script:

# (a) Change Q_HOST to query your host to get information

# Q_HOST="192.168.1.2 127.0.0.1 192.168.1.2"

# (b) Setup USR, who is used to connect via ssh and already setup to connect

# via ssh-keys

# USR="nixcraft"

# (c)Show warning if server load average is below the limit for last 5 minute.

# setup LOAD_WARN as per your need, default is 5.0

# LOAD_WARN=5.0

# (d) Setup your network title using MYNETINFO

# MYNETINFO="My Network Info"

# (e) Save the file

# Please refer to forum topic on this script:

# Also download the .gif files and put them in your output dir

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

# Execute script as follows (and copy .gif file in this dir) :

# this.script.name > /var/www/html/info.html

# ============================================================================

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

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

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

# SSH SERVER HOST IPS, setup me

# Change this to query your host

Q_HOST="192.168.1.2 127.0.0.1 192.168.1.2"

# SSH USER, change me

USR="nixcraft"

# Show warning if server load average is below the limit for last 5 minute

LOAD_WARN=5.0

# Your network info

MYNETINFO="My Network Info"

# if it is run as cgi we can do reload stuff too :D

PBY='Powered by <a href="http://cyberciti.biz/download/">script</a>'

# font colours

GREEN='<font color="#00ff00">'

RED='<font color="#ff0000">'

NOC='</font>'

LSTART='<ul><li>'

LEND='</li></ul>'

# Local path to ssh and other bins

SSH="/usr/bin/ssh"

PING="/bin/ping"

NOW="$(date)"

## functions ##

writeHead(){

echo '<HTML><HEAD><TITLE>Network Status</TITLE></HEAD>

<BODY alink="#0066ff" bgcolor="#000000" link="#0000ff" text="#ccddee" vlink="#0033ff">'

echo '<CENTER><H1>'

echo "$MYNETINFO</H1>"

echo "Generated on $NOW"

echo '</CENTER>'

}

writeFoot(){

echo "<HR><center>$PBY</center>"

echo "</BODY></HTML>"

}

## main ##

writeHead

echo '<TABLE WIDTH=100% BORDER=2 BORDERCOLOR="#000080" CELLPADDING=4 CELLSPACING=4 FRAME=HSIDES RULES=NONE" >'

echo '<TR VALIGN=TOP>'

for host in $Q_HOST

#echo '<TD WIDTH=33% BGCOLOR="#0099ff">'

echo '<TD BGCOLOR="#0099ff">'

_CMD="$SSH $USR@$host"

rhostname="$($_CMD hostname)"

ruptime="$($_CMD uptime)"

if $(echo $ruptime | grep -E "min|days" >/dev/null); then

x=$(echo $ruptime | awk '{ print $3 $4}')

else

x=$(echo $ruptime | sed s/,//g| awk '{ print $3 " (hh:mm)"}')

ruptime="$x"

rload="$($_CMD uptime |awk -F'average:' '{ print $2}')"

x="$(echo $rload | sed s/,//g | awk '{ print $2}')"

y="$(echo "$x >= $LOAD_WARN" | bc)"

[ "$y" == "1" ] && rload="$RED $rload (High) $NOC" || rload="$GREEN $rload (Ok) $NOC"

rclock="$($_CMD date +"%r")"

rtotalprocess="$($_CMD ps axue | grep -vE "^USER|grep|ps" | wc -l)"

rfs="$($_CMD df -hT | grep -vE "^Filesystem|shm" \

| awk 'BEGIN{print "<ul>"}{w=sprintf("%d",$6);print "<li>" $7 \

"            " $6 \

"(" $2 ")<BR> <img src=\"indicator.gif\" height=\"4\" width=\"" w "\"> \

<BR><img src=\"graph.gif\"> \

<BR>" $4"/"$3 "</li>"}END{ print "</ul>"}')"

rusedram="$($_CMD free -mto | grep Mem: | awk '{ print $3 " MB" }')"

rfreeram="$($_CMD free -mto | grep Mem: | awk '{ print $4 " MB" }')"

rtotalram="$($_CMD free -mto | grep Mem: | awk '{ print $2 " MB" }')"

$PING -c1 $host>/dev/null

if [ "$?" != "0" ] ; then

rping="$RED Failed $NOC"

else

rping="$GREEN Ok $NOC"

echo "<b><u>$rhostname</u></b><BR>"

echo "Ping status: $rping<BR>"

echo "Time: $rclock<BR>"

echo "Uptime: $ruptime <BR>"

echo "Load avarage: $LSTART $rload $LEND"

echo "Total running process: $LSTART $rtotalprocess $LEND"

echo "Disk status:"

echo "$rfs"

echo "Ram/swap status:<ul>"

echo "<li>Used RAM: $rusedram</li>"

echo "<li>Free RAM: $rfreeram</li>"

echo "<li>Total RAM: $rtotalram </li></ul>"

echo "</td>"

done

echo "</tr></table>"

writeFoot

Shell script to General FreeBSD and Linux System information

in Monitoring last updated February 26, 2009

Shell script to display general FreeBSD and Linux System information such as, Hostname, OS version, Kernel version, Processor/CPU, Total RAM, System load, network interface, total logged in users, Hard disks, Runlevel etc in neat format.

How do I use the script?

You need to download following two files for FreeBSD operating systems:

File # 1 Save this file as /usr/local/etc/bashmonscripts
File # 2 : Save this file as /usr/local/etc/defaults.conf

For Linux system, you need to update /usr/local/etc/defaults.conf to point out exact binary path location. /usr/local/etc/bashmonscripts is nothing but functions library used by this script. bashmonscripts works under both Linux and FreeBSD.

#!/bin/bash
# Shell script to General FreeBSD and Linux System information such as:
# Hostname, OS version, Kernel version, Processor/CPU, Total RAM,
# System load, network interface, total logged in users, Hard disks,
# Runlevel etc. I will write separate scripts for detailed system 
# information :D
# Copyright (c) 2005 nixCraft project
# This script is licensed under GNU GPL version 2.0 or above
# For more info, please visit: 
#            http://cyberciti.biz/shell_scripting/bmsinstall.php
# -------------------------------------------------------------------------
# This script is part of nixCraft shell script collection (NSSC)
# Visit http://bash.cyberciti.biz/ for more information.
# -------------------------------------------------------------------------

SPATH="/usr/local/etc/bashmonscripts"
INITBMS="$SPATH/defaults.conf" 
[ ! -f $INITBMS ] && exit 1 || . $INITBMS

echo "Hostname:" $(getHostName)
echo "OS Name:" $($UNAME)
echo "OS Version:" $($UNAME -mr)
echo "Processor:" $(getCpuInfo)
echo "Total Physical Memory (RAM):" $(getRealRamInfo)
echo "System Load:" $(getSystemLoad)
echo "Date & Time:" $($DATE)
echo "Network interface:" $(getNumberOfInterfaces)
echo "Total logged in users:" $(getNumberOfLoggedInUsers)
echo "Total running process:" $(getNumberOfRunningProcess)
echo "Total SCSI/IDE disks:" $(getDiskDrives)
echo "Mounted partitions:" $(getNumberOfParittions)
echo "Loaded dynamic kernel modules/drivers:" $(getNumberOfKernelModules)
echo "OS Rulevel:" $(getOsRunLevel)

#!/bin/bash

# Shell script to General FreeBSD and Linux System information such as:

# Hostname, OS version, Kernel version, Processor/CPU, Total RAM,

# System load, network interface, total logged in users, Hard disks,

# Runlevel etc. I will write separate scripts for detailed system

# information :D

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

# For more info, please visit:

# http://cyberciti.biz/shell_scripting/bmsinstall.php

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

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

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

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

SPATH="/usr/local/etc/bashmonscripts"

INITBMS="$SPATH/defaults.conf"

[ ! -f $INITBMS ] && exit 1 || . $INITBMS

echo "Hostname:" $(getHostName)

echo "OS Name:" $($UNAME)

echo "OS Version:" $($UNAME -mr)

echo "Processor:" $(getCpuInfo)

echo "Total Physical Memory (RAM):" $(getRealRamInfo)

echo "System Load:" $(getSystemLoad)

echo "Date & Time:" $($DATE)

echo "Network interface:" $(getNumberOfInterfaces)

echo "Total logged in users:" $(getNumberOfLoggedInUsers)

echo "Total running process:" $(getNumberOfRunningProcess)

echo "Total SCSI/IDE disks:" $(getDiskDrives)

echo "Mounted partitions:" $(getNumberOfParittions)

echo "Loaded dynamic kernel modules/drivers:" $(getNumberOfKernelModules)

echo "OS Rulevel:" $(getOsRunLevel)