SHELL脚本自动备份数据库

#!/bin/bash
db_user="root"
db_passwd="dddddd "
db_name="mmmmmm"

cd /db_backup
echo "you are in bakmysql directory now"

backup_dir="/db_backup"

#时间格式
time=$(date+ "%Y+%m+%d")
#mysql备份命令
mysqldump -u$db_user -p$db_passwd $db_name > "$backup_dir/$db_name"-"$time.dump"
echo "your database backup successfully completed"

#删除7天前的备份文件
SevenDays=$(date -d -7days +"%Y%m%d")
if [ -f /db_backup/ebkcmp-$SevenDays.dump]
then
rm -rf /db_backup/ebkcmp-$SevenDays.dump
echo "you have delete the sql file"
else
echo "the sql file not exits"
echo "bash completed"
fi