mysql备份保留一个月的数据文件

#!/bin/sh
# File: /data/backup/dhdatabak.sh
# Write by:sandy
# Last Modify:2013-09-11
# Database info
DB_NAME="osite"
DB_USER="user"
DB_PASS="pwd"

# Others vars
BCK_DIR="/data/backup/dhdata"
DATE=`date "+%Y%m%d-%H_%M"`
DAYS=30
LOGFILE=/data/backup/logs/dhbackup.log

# TODO
mysqldump -R --opt -u$DB_USER -p$DB_PASS $DB_NAME  > $BCK_DIR/dh_$DATE.sql
echo "$date Database:$databases backup success!">>$LOGFILE
cd $BCK_DIR
tar -zcvf dh$DATE.tar.gz dh_$DATE.sql

rm $BCK_DIR/dh_$DATE.sql

find $BCK_DIR -name "dh*" -type f -mtime +$DAYS -exec rm {} \;

10 1 * * * root /data/backup/dhdatabak.sh >> /data/backup/logs/cronlog.txt 2>&1