Share mysql backup database script in centos

DBDIR=/data/mysql
BACKDIR=/data/bak/mysql
TIME=`date -d "today" +%F`
DB=$(ls -p $DBDIR | grep / |tr -d / | grep -Ev 'information_schema|performance_schema|mysql|test')
/etc//mysqld stop
if [ -d $BACKDIR ]
then
        echo "OK!"
else
        mkdir -p $BACKDIR
fi
cd $DBDIR
for i in $DB
do
tar czf $BACKDIR/$i\_db\_$ $i
done
/etc//mysqld start
find $BACKDIR -name "*." -type f -mtime +15 -exec rm {} \;  >/dev/null 2>&1