shell脚本记录

1.数据库备份

使用场景：mysql数据库中有多个数据库要备份，排除系统的库

原代码：

#!/bin/bash

#备份mysql数据库，mysql系统自带的数据库除外

#创建相关文件夹

db_user="root"

db_path=/usr/bin

time=`date +%Y%m%d%H%M%S`

backup_dir="/home/mysqlbak/$time"

mkdir -p $backup_dir

#创建日志文件记录开始时间

echo -n "开始：" >>/home/mysqlbak/mysqlbak.log

echo `date` >>/home/mysqlbak/mysqlbak.log

#开始备份

mysql -uroot -e "show databases;"|awk '{print $1}'|egrep -vw "mysql|Database|information_schema|performance_schema|test|sys" > ./databases_info

for databaseName in $(cat databases_info)

do

        $db_path/mysqldump -u$db_user $databaseName > $backup_dir/$databaseName.sql

#       find $backup_dir -type f -mtime +8 -exec rm -rf {} \;

done

#记录备份结束时间

echo -n "结束：" >>/home/mysqlbak/mysqlbak.log

echo `date` >>/home/mysqlbak/mysqlbak.log