Back up the database on linux and automatically delete old data older than the specified time

Don't talk nonsense, just go to the script

1. Automatically back up the database specified on mysql and keep the data for the specified number of days.

#!/usr/bin/env bash

dbName="xMyDB"                    #定义要备份的数据库名
xTime=`date "+%Y-%m-%d_%H:%M:%S"`
bakPath="/data/backup/${dbName}"  #备份路径
saveDay=10          #设定保留多少天的数据

if [ ! -d $bakPath ];then
        mkdir -p $bakPath
fi

if [ -f /data/backup/${dbName}/${dbName}-${xTime}.sql ];then
        rm -rf /data/backup/${dbName}/${dbName}-${xTime}.sql
fi

# 备份zabbix的mysql数据库
mysqldump -u root -pMysqlMiMa $dbName > /data/backup/${dbName}/${dbName}-${xTime}.sql

if [ $? -eq 0 ];then
        echo "$xTime dbname:$dbName backup_success" >> /data/backup/${dbName}/${dbName}.log
else
        echo "$xTime dbname:$dbName backup_failed" >> /data/backup/${dbName}/${dbName}.log
fi

# 只保留$saveDay天的备份数据，在此之前的备份都删掉，以节约磁盘
find $bakPath -mtime +${saveDay} -type f -name \*.sql -exec rm -rf {} \;
#脚本注释：删除备份目录下指定提案书的文件，文件名后缀是.sql的所有文件
#还可以这么写find $bakPath -mtime +${saveDay} -type f -name \*.sql |xargs rm -f

2. Don't forget to add executable permissions to the script.

chmod +x /data/script/xAutoBackupMysqlForMydb.sh

3. Add the script to the scheduled task

crontab -e

Then write the plan below 

#每天早上7.59点备份一次mysql
57 07 * * * sh /data/script/xAutoBackupMysqlForMydb.sh

--------------END------------------May 10, 2020 22:17:09------ ----------------------

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