hostname – nixCraft

Shell Script To Check A Record For Given Domain or Hostname On All Nameservers

in Domain last updated July 30, 2008

Linux Shell script to verify dns ‘A’ record for given hostname or domain using master and slave dns server.

SSH login expect shell script to supply username and password

in Security last updated May 21, 2012

A simple shell script (expect script) to supply OpenSSH root/admin password for remote ssh server and execute the Unix / Linux / BSD commands.

Monitor UNIX / Linux Server Disk Space with Shell Script

in Monitoring last updated April 10, 2008

Shell script to monitor or watch the disk space and send an email alert if the (free avilable) percentage of space is >= 90%

#!/bin/sh
# Shell script to monitor or watch the disk space
# It will send an email to $ADMIN, if the (free avilable) percentage 
# of space is >= 90% 
# -------------------------------------------------------------------------
# Copyright (c) 2005 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.
# ----------------------------------------------------------------------
# Linux shell script to watch disk space (should work on other UNIX oses )
# SEE URL: http://www.cyberciti.biz/tips/shell-script-to-watch-the-disk-space.html
# set admin email so that you can get email
ADMIN="me@somewher.com"
# set alert level 90% is default
ALERT=90
df -H | grep -vE '^Filesystem|tmpfs|cdrom' | awk '{ print $5 " " $1 }' | while read output;
do
  #echo $output
  usep=$(echo $output | awk '{ print $1}' | cut -d'%' -f1  )
  partition=$(echo $output | awk '{ print $2 }' )
  if [ $usep -ge $ALERT ]; then
    echo "Running out of space \"$partition ($usep%)\" on $(hostname) as on $(date)" | 
     mail -s "Alert: Almost out of disk space $usep" $ADMIN
  fi
done

#!/bin/sh

# Shell script to monitor or watch the disk space

# It will send an email to $ADMIN, if the (free avilable) percentage

# of space is >= 90%

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

# 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.

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

# Linux shell script to watch disk space (should work on other UNIX oses )

# SEE URL: http://www.cyberciti.biz/tips/shell-script-to-watch-the-disk-space.html

# set admin email so that you can get email

ADMIN="me@somewher.com"

# set alert level 90% is default

ALERT=90

df -H | grep -vE '^Filesystem|tmpfs|cdrom' | awk '{ print $5 " " $1 }' | while read output;

#echo $output

usep=$(echo $output | awk '{ print $1}' | cut -d'%' -f1 )

partition=$(echo $output | awk '{ print $2 }' )

if [ $usep -ge $ALERT ]; then

echo "Running out of space \"$partition ($usep%)\" on $(hostname) as on $(date)" |

mail -s "Alert: Almost out of disk space $usep" $ADMIN

done

UNIX / Linux Shell Script For Monitoring System network with ping command

in Monitoring last updated August 1, 2009

#!/bin/bash
# Simple SHELL script for Linux and UNIX system monitoring with 
# ping command
# -------------------------------------------------------------------------
# Copyright (c) 2006 nixCraft project <http://www.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.
# -------------------------------------------------------------------------
# Setup email ID below
# See URL for more info:
# https://www.cyberciti.biz/tips/simple-linux-and-unix-system-monitoring-with-ping-command-and-scripts.html
# -------------------------------------------------------------------------

# add ip / hostname separated by white space 
HOSTS="cyberciti.biz theos.in router"

# no ping request
COUNT=1

# email report when 
SUBJECT="Ping failed"
EMAILID="me@mydomain.com"
for myHost in $HOSTS
do
  count=$(ping -c $COUNT $myHost | grep 'received' | awk -F',' '{ print $2 }' | awk '{ print $1 }')
  if [ $count -eq 0 ]; then
    # 100% failed 
    echo "Host : $myHost is down (ping failed) at $(date)" | mail -s "$SUBJECT" $EMAILID
  fi
done

#!/bin/bash

# Simple SHELL script for Linux and UNIX system monitoring with

# ping command

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

# 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.

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

# Setup email ID below

# See URL for more info:

# https://www.cyberciti.biz/tips/simple-linux-and-unix-system-monitoring-with-ping-command-and-scripts.html

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

# add ip / hostname separated by white space

HOSTS="cyberciti.biz theos.in router"

# no ping request

COUNT=1

# email report when

SUBJECT="Ping failed"

EMAILID="me@mydomain.com"

for myHost in $HOSTS

count=$(ping -c $COUNT $myHost | grep 'received' | awk -F',' '{ print $2 }' | awk '{ print $1 }')

if [ $count -eq 0 ]; then

# 100% failed

echo "Host : $myHost is down (ping failed) at $(date)" | mail -s "$SUBJECT" $EMAILID

done

Shell script to backup directories from Linux server to Windows 2000/NT Server

in Backup last updated August 5, 2008

#!/bin/bash
# Shell script to backup directories from Linux server to Windows 2000/NT Server. 
# Run it as follows
# Scriptname /home backup abc123 //server2000/backup
# Backup /home directory from Linux box  to NT/2000 box called
# 'server2000' in share called '/backup' with username
# 'backup' and password 'abc123'
# --------------------------------------------------------------------
# This is a free shell script under GNU GPL version 2.0 or above
# Copyright (C) 2005 nixCraft project
# Feedback/comment/suggestions : http://cyberciti.biz/fb/
# -------------------------------------------------------------------------
# This script is part of nixCraft shell script collection (NSSC)
# Visit http://bash.cyberciti.biz/ for more information.
# -------------------------------------------------------------------------

# backup what?
FROM=$1
# NT Connection Info #
# NT Username
NTUSER=$2
# NT Password
NTPASSWD=$3
# NT ShareName i.e //server/backup etc
NTSHARE="$4"

# BackUpDir Name
BACKDIR="$(hostname -s)"

# Local mount point
MNT="/mnt/smbbox"

# Get date and time 
NOW=$(date +"%m-%d-%Y-%I_%M%P")
# backup file  name
BAKFILE="backup.$NOW.tar.gz"

if [ "$#" != "4" ]; then
	echo "Syntax:"
	echo "$(basename $0) {Linux-directory} {NTusername} {NTpassword} {//NTserver/share-name}"
	exit 1
fi
# make sure $from do exits
if [ ! -d $FROM ]; then
   echo "Backup source directory \"$FROM\" does NOT exist"
   exit 2
fi
#Create tar to backup first
tar -czf /tmp/$BAKFILE $FROM 

#Mount the smb to /mnt 
[ ! -d $MNT ] && mkdir -p $MNT || :

mount -t smbfs -o username=$NTUSER,password=$NTPASSWD $NTSHARE $MNT

[ ! -d $MNT/$BACKDIR ] && mkdir -p $MNT/$BACKDIR || :

# Copy new tar to ntbox
cp /tmp/$BAKFILE $MNT/$BACKDIR

# Send sync aka force to write data before issuing umount
sync

# issue umount
umount $MNT

#!/bin/bash

# Shell script to backup directories from Linux server to Windows 2000/NT Server.

# Run it as follows

# Scriptname /home backup abc123 //server2000/backup

# Backup /home directory from Linux box to NT/2000 box called

# 'server2000' in share called '/backup' with username

# 'backup' and password 'abc123'

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

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

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

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

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

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

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

# backup what?

FROM=$1

# NT Connection Info #

# NT Username

NTUSER=$2

# NT Password

NTPASSWD=$3

# NT ShareName i.e //server/backup etc

NTSHARE="$4"

# BackUpDir Name

BACKDIR="$(hostname -s)"

# Local mount point

MNT="/mnt/smbbox"

# Get date and time

NOW=$(date +"%m-%d-%Y-%I_%M%P")

# backup file name

BAKFILE="backup.$NOW.tar.gz"

if [ "$#" != "4" ]; then

echo "Syntax:"

echo "$(basename $0) {Linux-directory} {NTusername} {NTpassword} {//NTserver/share-name}"

exit 1

# make sure $from do exits

if [ ! -d $FROM ]; then

echo "Backup source directory \"$FROM\" does NOT exist"

exit 2

#Create tar to backup first

tar -czf /tmp/$BAKFILE $FROM

#Mount the smb to /mnt

[ ! -d $MNT ] && mkdir -p $MNT || :

mount -t smbfs -o username=$NTUSER,password=$NTPASSWD $NTSHARE $MNT

[ ! -d $MNT/$BACKDIR ] && mkdir -p $MNT/$BACKDIR || :

# Copy new tar to ntbox

cp /tmp/$BAKFILE $MNT/$BACKDIR

# Send sync aka force to write data before issuing umount

sync

# issue umount

umount $MNT