數據庫自動備份原理，實戰

前幾篇博客已經相繼公開了去轉盤網的所有技術細節，如下：

百度網盤爬蟲

中文分詞算法

邀請好友註冊

js分頁部分代碼

這篇博客我將繼續公開數據庫自動備份的代碼。可以這麼說，沒有數據庫，一切就是個蛋，沒有數據庫備份，一切還是個蛋，你可以想象數據庫備份多麼重要。不會linux，不會寫shell的朋友麻煩先去補補。不過你說我牛逼，不補也能看懂，那沒問題，哈哈，廢話不說了。老規矩，上代碼：

#!/bin/bash
time=$(date +"%d-%m-%Y")
pre=/home/ubuntu #想放到那裏麻煩自己配置下哈
if [ ! -d "$pre/data_backup/$time" ]
then
  mkdir -p $pre/data_backup/$time
  echo "create $pre/data_backup/$time"
else
  echo "exist $pre/data_backup/$time"
fi
if [ -d "$pre/data_backup/$time" ]
then
 mysqldump -h10.66.102.75 -uroot -p123456 --opt winrun user > $pre/data_backup/$time/user.sql
 mysqldump -h10.66.102.75 -uroot -p123456--opt winrun CategoryInfo  > $pre/data_backup/$time/CategoryInfo.sql
 mysqldump -h10.66.102.75 -uroot -p123456 --opt winrun admin_info > $pre/data_backup/$time/admin_info.sql
 mysqldump -h10.66.102.75 -uroot -p123456 --opt winrun admin_loginfo > $pre/data_backup/$time/admin_loginfo.sql
 mysqldump -h10.66.102.75 -uroot -p123456 --opt winrun admin_notice_info  > $pre/data_backup/$time/admin_notice_info.sql
 mysqldump -h10.66.102.75 -uroot -p123456--opt winrun advertising_info  > $pre/data_backup/$time/advertising_info.sql
 mysqldump -h10.66.102.75 -uroot -p123456--opt winrun ajax_request_info  > $pre/data_backup/$time/ajax_request_info.sql
 mysqldump -h10.66.102.75 -uroot -p123456 --opt winrun bt_file_info  > $pre/data_backup/$time/bt_file_info.sql
 echo "backup finished"
 cd $pre/data_backup #enter dir
 zip -r $time.zip $time/
 rm -fr $time #delete
 cd -
 echo "zip backup database finished"
else
 echo "can not find backup file"
fi

注意，我的密碼我已經改了，這個不能告訴你們，所以喜歡copy的孩子麻煩自己該密碼。下面我教大家玩下crotab，代碼如下：

# Edit this file to introduce tasks to be run by cron.
#
# Each task to run has to be defined through a single line
# indicating with different fields when the task will be run
# and what command to run for the task
#
# To define the time you can provide concrete values for
# minute (m), hour (h), day of month (dom), month (mon),
# and day of week (dow) or use '*' in these fields (for 'any').#
# Notice that tasks will be started based on the cron's system
# daemon's notion of time and timezones.
#
# Output of the crontab jobs (including errors) is sent through
# email to the user the crontab file belongs to (unless redirected).
#
# For example, you can run a backup of all your user accounts
# at 5 a.m every week with:
# 0 5 * * 1 tar -zcf /var/backups/home.tgz /home/
#
# For more information see the manual pages of crontab(5) and cron(8)
#
# m h  dom mon dow   command
10 1 * * 1,3,5  /home/backup.sh >> /home/backup.log

有用的是最下面的這一句，看到沒有，備份完了還得有個log，不然誰知道備份成什麼樣子了，一點都不懂crontab麻煩自己百度下，我也一時給你講不明白。

上面是備份的結果，注意，備份完了之後是壓縮包的形式，所以請你先安裝壓縮工具，apt-get install XXXX 不會的還是麻煩百度下，實在簡單成狗了。

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