以备份qunniao数据库为例

###################################################################
# File Name: mysql_backup.sh
# Author: xunyin
# E-mail: lnhxzwb@126.com
# Created Time: Fri 18 May 2019 05:01:02 PM CST
#==================================================================
#!/bin/bash
# MYSQL备份脚本
mysql_back()
 {
 Date=$(date +%Y%m%d)
 HOST="127.0.0.1"
 NAME="root"
 PASSWD="123456"
 PORT="3306"
 DB="qunniao"
 
#清除15天前数据
 find ${path}/*.tar.gz -type f -mtime +15 -exec rm -rf {} \; 
 #rm -rf ${path}/${DB}_$(($Date - 30)).tar.gz #保留30天数据
 cd ${path}
 mysqldump  -u${NAME} -p${PASSWD} ${DB}>${DB}_${Date}.sql
 echo "$Date 已成功备份数据库 ${DB}" > mysql_info.txt &>/dev/null
 tar -zcf ${DB}_${Date}.tar.gz ${DB}_${Date}.sql mysql_info.txt 
 
#发送邮件(mailx安装配置略)
 mailx -s  "${DB}数据库备份成功" -a "${patch}/${DB}_${Date}.tar.gz" 'lnhxzwb@126.com'<mail_info.txt
 rm -rf ${DB}_${Date}.sql mysql_info.txt
 }
 path=/data/backup
 if [ -d ${path} ];then
 cd ${path}
 mysql_back
 else
 mkdir -p ${path}
 mysql_back
 fi