backup script added

bash_scripts/backup.sh

@@ -0,0 +1,25 @@
+#!/bin/bash
+
+
+# Check to make sure the user has entered exactly two arguments.
+if [ $# -ne 2 ]
+then
+	echo "Usage backup.sh <source_directory> <target_directory>"
+	echo "Please try again."
+	exit 1
+fi
+
+# Check to see if rsync is installed
+if ! command -v rsync > /dev/null 2>&1
+then 
+	echo "This script requires rsync to be installed."
+	echo "Please use your distribution's package manager to install and try again."
+	exit 2
+fi
+
+# Capture the current date and store it to the format YYYY-MM-DD
+current_date=$(date +%Y-%m-%d_%H-%M-%S)
+
+rsync_options="-avb --backup-dir $2/$current_date --delete "
+
+$(which rsync) $rsync_options $1 $2/current >> backup_$current_date.log