Script to delete old files in a directory by a pattern

deleteOldFiles.sh

#!/bin/bash
# set -x

BASE_DIR=/backups
TOTAL_KEEP=10

FIND_EXPRESSION="[0-9].+\_backup\.tar\.gz"

TOTAL_BACKUPS=`ls $BASE_DIR| egrep "$FIND_EXPRESSION" | wc -l`

RESULT=`expr $TOTAL_BACKUPS - $TOTAL_KEEP`

if [ "$RESULT" -le "0" ];then
    echo "No files found to delete"
    exit 0
fi

FILES_TO_REMOVE=`ls $BASE_DIR| egrep "$FIND_EXPRESSION" | head -n $RESULT -`

echo "Files to remove $RESULT:"
echo $FILES_TO_REMOVE

for FILEX in ${FILES_TO_REMOVE}
do
    echo "> Deleting ..."
    echo $BASE_DIR/$FILEX
    rm $BASE_DIR/$FILEX
    echo "> Done!"
    echo "-"
done

echo "Maintenance finished!"