remove_old_backup.sh

#!/bin/sh

function keep_only_last_for_n_days_ago(){

	echo "function called with $1"	
	CDIR=`date +%y%m%d -d "$1 day ago"`
	count=0
	for j in `ls -1t "$CDIR"`  
	do
		count=`expr $count + 1`
		if [ $count == 1 ]
		then
			echo "Not deleting $j"
			continue
		fi
			echo "Deleting $j"
			rm "$CDIR/$j"
	done
}

#
# Keeping only one file for last week for each day. The last backup on that particular day.
#

for i in {7..30}
do
	keep_only_last_for_n_days_ago $i
done


#Keeping only weekend file

for k in {30..50}
do
	CDIRDAY=`date +%A -d "$k day ago"`
	CDIR=`date +%y%m%d -d "$k day ago"`
	if [ $CDIRDAY == "Sunday" ]
	then
		echo "it's sunday"
		keep_only_last_for_n_days_ago $k
		continue
	fi
		echo "it's not a sunday its $CDIRDAY on $CDIR"
		rm -rf "$CDIR"
	
done