added backup and rotation scripts

Author: sanjaraiy

backup.sh

@@ -0,0 +1,59 @@
+#!/bin/bash
+
+
+<<readme
+ This is a script for backup with 5 days rotation
+
+
+ Usage:
+ ./backup.sh <path to your source> <path to backup folder>
+readme
+
+
+function display_usage {
+      echo "./backup.sh <path to your source> <path to backup folder>"
+
+}
+
+if [$# -eq 0]; then
+       display_usage
+
+fi       
+
+source_dir=$1
+timestamp=$('+%Y-%m-%d-%H-%M-%S')
+backup_dir=$2
+
+function create_backup {
+  
+	zip -r "${backup_dir}/backup_${timestamp}.zip" "${source_dir}" > /dev/null
+        
+	if [ $? -eq 0]; then
+	echo "backup generated successfully for ${timestamp}" 
+        fi
+}
+
+function perform_rotation {
+   backups=($(ls -t "${backup_dir}/backup_"*.zip 2>/dev/null))
+  # echo "${backups[@]}"
+   
+   if ["${#backups[@]}" -gt 5]; then
+	   echo "Performing rotation for 5 days"
+          
+	   backups_to_remove=("${backups[@]:5}")
+
+	  # echo "${backups_to_remove[@]}"
+
+	   for backup in "${backups_to_remove[@]}";
+           do
+		   rm -f ${backup}
+	   done
+
+   fi
+}
+
+create_backup
+perform_rotation
+
+
+