backup.sh

#!/bin/bash
Source=/apps
Destination=/data/Files/Backups/home.pathar.tl
DestinationFilename="$(date '+%Y-%m-%d.%H-%m').tar.gz"

mkdir -p "${Destination}/Daily"
mkdir -p "${Destination}/Weekly"
mkdir -p "${Destination}/Monthly"

# Get the current month and weekday integer
MonthDay=`date +"%d"`
WeekDay=`date +"%u"`

tar -zcf "${Destination}/Daily/$(date '+%Y-%m-%d.%H-%m').tar.gz" ${Source}

# If it's Sunday
if [ "$WeekDay" -eq 7 ] ; then
	cd $Destination/Daily

	# Remove all but the latest 8 dailies
	ls -t $Destination/Daily | sort -r | tail -n +9 | xargs rm --

	# Move the oldest daily over into weekly
	ls -t $Destination/Daily | sort -r | tail -n 1 | xargs -I {} mv {} $Destination/Weekly
fi

# If it's the first of the month
if [ "$MonthDay" -eq 1 ] ; then
	cd $Destination/Weekly

	# Move the oldest weekly over into monthly
	ls -t $Destination/Weekly | sort -r | tail -n 1 | xargs -I {} mv {} $Destination/Monthly
fi