Backup-script-gpg.sh.txt

#!/bin/bash
#Author:Muhamamd Asim
#Date:10-june-2017
#Purpose:Back up on a remote location, with compression & auto updation of backup.



#Defining the source to backup



#SOURCE
LOCATION="/home/"
SRC="source"

#Creation of Source directory at /home, in which we place all our data, which we want to backup.
if [ ! -d $LOCATION$SRC ]
then
 
 echo -e "\nCreation of $SRC directory at $LOCATION\n"
 
 mkdir $LOCATION$SRC
 

fi     
     
     
SRCNAME="`date +%F`.tar"
#DESTINATION
DST="/home/destination"
 
if [ ! -d $DST ] 
then
     echo -e "\nCreation of $DST directory at $LOCATION\n"
     
     mkdir $DST 
     
     
  fi   
     
#Create A Backup of $SRC



#Note:Very Very Important research tar actually creates an archiving of all absolute paths, which are not required.


#The option -C works; just for clarification I'll post 1 example

#creation of a tarball without the full path: full path /home/testuser/workspace/project/application.war 
#and what we want is just project/application.war so:

#tar -cvf output_filename.tar  -C /home/testuser/workspace project

#Note: there is a space between workspace and project; tar will replace full path with just project

SRCTAR=`tar -cvf "$SRCNAME" -C "$LOCATION" "$SRC"`
echo $SRCTAR &> /dev/null


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

    echo -e "\nMoving Source Backup to Destination\n"
    
    mv $SRCNAME $DST &> /dev/null
    
    if [ ! -f $DST/$SRCNAME ]
    
    then
          echo -e "\nTar Back file does not exist\n"
          
       elif	[ -f $DST/$SRCNAME ]
       then
       
 BZ2NAME="`date +%F`.tar.bz2"
 
 #echo $BZ2NAME 
 
 #Creation of BZ2 compression.
       
 BZ2=`tar -cjvf "$DST/$BZ2NAME" -C "$DST" "$SRCNAME"`                     
          
         echo  "$BZ2" &> /dev/null
         
         
    fi
    
#Removal .tar file from destination.
 GPGEXTENSION=".gpg"   
      if [ -f $DST/$BZ2NAME ]
         then
              echo -e "\nCreating a $BZ2NAME Compression Backup and encrypting this file as $BZ2NAME$GPGEXTENSION\n"
              
              
              
              rm -rf $DST/$SRCNAME$* &> /dev/null
              
           
       
                   
               
               fi
               
  #Extracting bz2 compression.
               
               if [ -f $DST/$BZ2NAME ]
               then
               bunzip2 $DST/$BZ2NAME   &> /dev/null
               
  #Updating tar file              
               if [ "$?" = "0" ]
                
                then
                tar   - uvf $DST/$SRCNAME  &> /dev/null
                
        #Recreation of BZ2 Compression.        
                
          BZ2=`tar -cjvf "$DST/$BZ2NAME" -C "$DST" "$SRCNAME"`                     
          
                 echo  "$BZ2"  &> /dev/null
                 
    #Re-removal .tar file from destination.
    
      if [ -f $DST/$BZ2NAME ]
         then
              #echo -e "\nWe are removing $SRCNAME from $DST & creating a $BZ2NAME\n"
              
              
              
              rm -rf $DST/$SRCNAME$* &> /dev/null
              
           
       
                   
               
               fi
                            
                 
                 
                      
                
                fi
               
               fi
               

#3rd Stage will be BZ2 Image with encryption.
 
 #Define encryption command first
 #We will be using gpg -c option for encrytion, which is -c, --symmetric               encryption only with symmetric cipher
 #symmetric means same key will be used for encryption and decrytion
 
 
 
 if [ -f $DST/$BZ2NAME ]
         then
         
#Creation of encryption with KEY variable, please set a KEY, further if you change a KEY, comment out the OLDKEY
         
GPGTHIS=`ls -lth $DST/ | head -n2 | grep -i bz2 | awk '{print $9}'`
 KEY="ami"       
        GPG=`gpg --yes --batch --passphrase=$KEY -c $DST/$GPGTHIS`
        
        echo $GPG 
        
        
 #Removal of bz2 image
        
     if [ "$?" = "0" ] #Opening of Removal of bz2 images 
     then
 REMOVEBZ2=`ls -ltrh $DST/*.bz2 | head -n1 | awk '{print $9}'`  
 
 rm -rf $REMOVEBZ2
 
 fi                      #Closing of Removal of bz2 Images from /home/destination   
 
     
           
#Shifting GPG encrypted file to a remote location 
GPGREMOTE=`ls -lth $DST/*.gpg | head -n1 | awk '{print $9}'`      
         if [ -f $GPGREMOTE ]
         then
         
      
         
        
        echo $GPGREMOTE  > /dev/null


REMOTE="192.168.1.7" 
    if [ -f $GPGREMOTE ]
        then
        
        ping -c3 $REMOTE &> /dev/null
        
        if [ "$?" = "0" ]
then    
      
      echo -e "\nWe are shifting your Data to $REMOTE please wait.....\n"

rsync -auv $GPGREMOTE  ssh root@$REMOTE:/root 2> /dev/null 




else
      echo -e "\n$REMOTE Server is down\n"
      
      fi


fi     
    
    fi
    
fi    
    
    else
          echo -e "\nSomething is wrong in creating $SRC tar backup\n"
    
    
    fi




#END