这是一个简单的mysql备份脚本。那个脚本可以手动使用，也可以在crontab中使用。
脚本以.sql格式进行备份，压缩sql文件，最后发送包含mysql备份状态的邮件。

添加可执行权限

chmod 700 db-backupscript.sh

安装mail命令

yum install mailx   ( Red Hat 和 CentOS)

或者

apt-get install mail-utils ( Debian 和 Ubuntu)

创建备份目录

mkdir -p /root/database-backup/

创建MySQL备份脚本

vi db-backupscript.sh

内容如下

#!/bin/bash
# mysql backup script
# Author: jack
#

MYSQLUSER=Mysql-user
PASSWORD=Mysql-user-Passw0rd
DBNAME=Database-Name

### Give MYSQL Server IP address or FQDN, For eg. 127.0.0.1 or localhost
MYSQLHOST=127.0.0.1

BACKUPPATH=/root/database-backup/$DBNAME-`date +%F-%H%M%S`

#You can give multiple email id in MAILTO variable by using comma (,) for eg. MAILTO=abc@example.com,xyz@example.com
MAILTO=your-emailid@example.com

mysqldump -h$MYSQLHOST -u$MYSQLUSER -p$PASSWORD $DBNAME > $BACKUPPATH

### compressing the file 
gzip $BACKUPPATH

FILESIZE=$( du -sh $BACKUPPATH.gz )

if [ ! -f  $BACKUPPATH.gz ]; then
    echo "$BACKUPPATH.gz File not found!, Database Name: $DBNAME" | mail -s "$DBNAME backup failed" $MAILTO
else
    echo "$BACKUPPATH.gz File found,Database Name: $DBNAME, Actual size after compression is $FILESIZE " | mail -s "DBNAME database backup is done" $MAILTO
fi