備份指令碼（生產環境已經使用，沒有問題）

#!/bin/bash
# 設定mysql的登入使用者名稱和密碼(根據實際情況填寫)
mysql_user="root"
mysql_password="123456"
mysql_host="localhost"
mysql_port="3306"
mysql_charset="utf8mb4"
mysql_shema="marshall"
# 備份檔案存放地址(根據實際情況填寫)
backup_location=/home/kilox/sql_backup

# 是否刪除過期資料
expire_backup_delete="ON"
expire_days=30
backup_time=`date +%Y%m%d%H%M`
backup_dir=$backup_location
welcome_msg="Welcome to use MySQL backup tools!"

# 判斷mysql例項是否正常執行
mysql_ps=`ps -ef |grep mysql |wc -l`
mysql_listen=`netstat -an |grep LISTEN |grep $mysql_port|wc -l`
if [ [$mysql_ps == 0] -o [$mysql_listen == 0] ]; then
        echo "ERROR:MySQL is not running! backup stop!"
        exit
else
        echo $welcome_msg
fi

# 備份指定資料庫中資料(此處假設資料庫是$mysql_shema)
mysqldump -h$mysql_host -P$mysql_port -u$mysql_user -p$mysql_password -B $mysql_shema> $backup_dir/$mysql_shema-$backup_time.sql
flag=`echo $?`
if [ $flag == "0" ];then
        echo "database $mysql_shema success backup to $backup_dir/$mysql_shema-$backup_time.sql.gz"
else
        echo "database $mysql_shema backup fail!"
fi

# 刪除過期資料
if [ "$expire_backup_delete" == "ON" -a  "$backup_location" != "" ];then
        `find $backup_location/ -type f -mtime +$expire_days | xargs rm -rf`
        echo "Expired backup data delete complete!"
fi
 

定時任務

在 /etc/cron.d目錄下面新建檔案，檔案中加入如下內容

# 新增定時任務(每天12:50以及23:50執行備份操作)
50 12,23 * * * cd /home/app/jinxd/;sh mysql_backup.sh >> log.txt 2>>log.txt

啟動：/etc/init.d/cron start ( service cron start )
重啟：/etc/init.d/cron restart ( service cron restart )
關閉：/etc/init.d/cron stop ( service cron stop )