KEEP=2

COUNT=0
for i in /backup/oxygen/etc.*
do
        if [ -d $i -a ! -L $i ]
        then
                COUNT=$(($COUNT+1))
        fi
done;

TOTAL=$COUNT
DELETE=$(($TOTAL-$KEEP))

COUNT=0
for i in /backup/oxygen/etc.*
do
        if [ -d $i -a ! -L $i ]
        then
                COUNT=$(($COUNT+1))
                if [ $COUNT -le $DELETE ]
                then
                        echo "rm "$i
                fi

                if [ $COUNT -eq $TOTAL ]
                then
                        LATEST=$i
                fi
        fi
done;

echo "latest is "$LATEST