Backup file rotation

gistfile1.sh

#!/bin/bash
DEST=/root/BACKUPS

# Code to actually create backup files goes here...

# Check if we need to rotate the backup files.
FC=`ls ${DEST}/*.tar | wc -l`
if [[ $FC -gt 6 ]]; then
    echo "Too many backup files. Deleting oldest one..."
    DELETE_FILE=`ls -tr ${DEST}/*.tar | head -1`
    rm $DELETE_FILE
fi

exit 0