Linux平台下MySQL数据库定时备份

根据要求写下MySQL备份脚本，要求如下：对指定数据库进行日备份并且将备份文件保存一周，对一周以外文件自动删除。

1、创建shell脚本
[root@server18 mysql]$ mkdir -p /home/mysql/DB_BAK/day_bak/

[root@server18 mysql]$ vim day_bak.sh

DB_NAME='tdc_ntt_debug'
USER='mysql'
PWD='mysql'
TIME=$(date +%Y%m%d)
DEL_TIME=$(date --date="7 days ago" +%Y%m%d)
DB_BAK_NAME=tdc_debug${TIME}.sql
DB_DEL_NAME=tdc_debug${DEL_TIME}.sql
BACKUP_PATH='/home/mysql/DB_BAK/day_bak/'
echo $BACKUP_PATH$DB_BAK_NAME
if test -f $BACKUP_PATH$DB_DEL_NAME
    then
        echo "Delete history dump file"
        rm -f $BACKUP_PATH$DB_DEL_NAME
fi
mysqldump -u $USER -p$PWD $DB_NAME > $BACKUP_PATH$DB_BAK_NAME

2.修改计划任务/etc/crontab

[root@server18 ~]# crontab -e

30 21 * * * root /home/mysql/DB_BAK/day_bak/day_bak.sh

每天晚上21：30进行MySQL备份，将备份文件保留7天。