Friday, May 06, 2011

Shell script to backup selected directories and upload securely (gpg) to FTP server

#!/bin/bash
# Shell script (BASH) to backup the selected directory on server and upload to
# another ftp server securely. This script uses the gpg command to
# encrypt the .tar.gz file before upload take place.
#
# In order to run this script you must have following tools installed:
# - /usr/bin/ncftpput
# - /bin/tar
# - /usr/bin/mail
# - /usr/bin/gpg
#
# Script also mails back the ftp operation failed or not
#
# Installation:
# Customize the script according to your need. You need to setup ftp
# server, password etc. Next, you need to setup gpg user name and
# import public key so that you can encrypt the files. Usually following two
# commands needed for gpg:
# gpg --import userkey
# gpg --edit-key KEY_ID|USER_ID
# Command>trust
#
# --------------------------------------------------------------------
# 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.
# -------------------------------------------------------------------------
 
# Dirs to backup, Separate multiple directories using space
# for example /home /www /data2
BACKUP="/home"
 
# Remote ftp server
FTPH="ftp.backup.com"
 
# Remote ftp user name
FTPU="ftpusername"
 
# Remote ftp user password
FTPP="secret"
 
# Local gpg user_id
GPGU="nixcraft"
 
# Remote directory, blank for default remote dir
# If dir does not exist it will be created automatically by ncftpput :)
FTPD="backup/"
 
# Temporary directory to store tar.gz file and process it
TMPD="/tmp"
 
# Mail message
# Admin email me@mycorp.com or pager@yourmobile.com
MTO="support@mycorp.com"
# Mail subject
MSUB="Backup $(hostname) report"
# Admin info, URL email id; change it according to your need :)
ADMIN_INFO="For support visit http://cyberciti.biz/fb/ or write an email to nobody@cyberciti.biz"
 
# Only change if your UNIX stores bin in diffrent location
NCFTP="/usr/bin/ncftpput"
TAR="/bin/tar" # must be gnu tar
MAILC="/usr/bin/mail"
GPG="/usr/bin/gpg"
 
#######################################################################
# Do not change anything below
#######################################################################
FILE="$(hostname).$(date +"%d-%m-%Y").tar.gz"
OUT="$TMPD/$FILE"
FOUT="$OUT.gpg"
MFILE="/tmp/ftpout.$$.txt"
MESS=""
 
if [ ! -x $TAR ]; then
echo "$TAR command not found, contact $ADMIN_INFO"
exit 1
fi
 
if [ ! -x $NCFTP ]; then
echo "$NCFTP command not found, contact $ADMIN_INFO"
exit 1
fi
 
if [ ! -x $GPG ] ; then
echo "$GPG command not found, contact $ADMIN_INFO"
exit 1
fi
 
$TAR -zcf $OUT $BACKUP
if [ $? -ne 0 ];
then
MESS="$TAR failed to create backup. Nothing uploaded to remote FTP $FTPH server"
else
# Encrypt the .tar.gz file before upload
$GPG -e -r $GPGU -o $FOUT $OUT
$NCFTP -m -u "$FTPU" -p "$FTPP" "$FTPH" "$FTPD" "$FOUT"
OSTAT="$?"
case $OSTAT in
0) MESS="Success.";;
1) MESS="Could not connect to remote host $FTPH.";;
2) MESS="Could not connect to remote host $FTPH - timed out.";;
3) MESS="Transfer failed.";;
4) MESS="Transfer failed - timed out.";;
5) MESS="Directory change failed.";;
6) MESS="Directory change failed - timed out.";;
7) MESS="Malformed URL.";;
8) MESS="Usage error. May be your version of ncftpput ($NCFTP) is old";;
9) MESS="Error in login configuration file.";;
10)MESS="Library initialization failed.";;
11) MESS="Session initialization failed.";;
*) MESS="Unknown error, contact admin $ADMIN_INFO";;
esac
fi
 
>$MFILE
echo "Backup status for $(hostname) as on $(date):" >>$MFILE
echo "" >>$MFILE
echo "Backup File : $FOUT" >>$MFILE
echo "Backup ftp server : $FTPH" >>$MFILE
echo "Backup status message : $MESS" >>$MFILE
echo "" >>$MFILE
echo "-- Automatically generated by $(basename $0)" >>$MFILE
 
# send an email to admin
$MAILC -s "$MSUB" $MTO <$MFILE
# remove the files
[ -f $MFILE ] && rm -f $MFILE || :
[ -f $FOUT ] && rm -f $FOUT || :
[ -f $OUT ] && rm -f $OUT || :
 
 
Regards,
Sukhwinder Singh 

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