search
HomeDatabaseMysql Tutoriallinux 定时自动备份 mysql

linux 定时自动备份 mysql

Jun 07, 2016 pm 03:47 PM
linuxmysqlbackuptimingenvironmentautomatic

环境 :linux centos 备份数据库类型 :mysql 备份需要用到的命令: rpm -q mysql //查看mysql是否安装,及其版本mysqldump -uusername -ppassword test test_2014-05-20.sql 一、用命令实现备份 1、备份数据 (某些系统mysqldump会出现找不到命令的情况,请根

环境:linux centos

备份数据库类型:mysql

备份需要用到的命令:

rpm -q mysql  //查看mysql是否安装,及其版本
mysqldump -uusername -ppassword test > test_2014-05-20.sql

一、用命令实现备份

1、备份数据 (某些系统mysqldump会出现找不到命令的情况,请根据实际mysql的bin目录操作)

#mysqldump -uusername -ppassword discuz > discuz_2010-04-01.sql
这样就把discuz数据库所有的表结构和数据备份到discuz_2010-04-01.sql里了,
如果数据量大会占用很大空间,这时可以利用gzip压缩数据。
命令如下:
#mysqldump -uusername -ppassword discuz | gzip > discuz_2010-04-01.sql.gz
一般还要用到错误重定向:
mysqldump -uroot -p123 test 2>> /mysql_backup/blog.txt | gzip > /mysql_backup/test_`date +%Y-%m-%d_%H%M%S`.sql.gz 2>> /mysql_backup/blog.txt

这里的mysql_backup是我新建的目录,blog.txt是日志文件,我们把错误信息都记录到这里

系统崩溃,重建系统时,可以这样恢复数据:

#mysql -uusername -ppassword discuz

二、利用crontab,系统每天定时备份mysql数据库

1、创建保存备份文件的路径/mysqldata
#mkdir /mysql_backup

2、创建/usr/sbin/bakmysql文件
输入以下内容:

mysqldump -uroot -p123 test 2>> /mysql_backup/blog.txt | gzip > /mysql_backup/test_`date +%Y-%m-%d_%H%M%S`.sql.gz 2>> /mysql_backup/blog.txt
3、修改文件属性,使其可以执行
#chmod +x /usr/sbin/bakmysql

4、现在添加计划任务
每天3点钟执行备份 

第一步:
写cron脚本文件,命名为cronmysql.cron。如:

#01 3 * * * root /usr/sbin/bakmysql      //像这种后面是命令路径的 一定要加上执行的用户

第二步:
添加定时任务。执行命令 “crontab crontest.cron”,大功告成

第三步:
"crontab -l" 查看定时任务是否成功或者检测/var/spool/cron下是否生成对应cron脚本

5、重新启动crond
#/etc/rc.d/init.d/crond restart
完成。

三、数据的恢复

只备份单个数据表

<span style="font-family: Arial, Helvetica, sans-serif;">mysqldump  -uroot -p123456  database table > dump.sql</span>

mysql -uusername –ppassword 数据库名 
<p><span>压缩包恢复</span></p>

<pre class="brush:php;toolbar:false">gzip -d <br>
<br>

<p><span><strong><span><strong>四、进阶篇</strong></span></strong></span></p>

<pre class="brush:php;toolbar:false">mkdir /mysql_backup/bak_`date +%Y-%m-%d` 2>> /mysql_backup/blog.txt
mysqldump -uroot -p123 test blog_user | gzip > /mysql_backup/bak_`date +%Y-%m-%d`/blog_user_`date +%Y-%m-%d`.sql.gz 2>> /mysql_backup/blog.txt
mysqldump -uroot -p123 test users | gzip > /mysql_backup/bak_`date +%Y-%m-%d`/users_`date +%Y-%m-%d`.sql.gz 2>> /mysql_backup/blog.txt

这里展示了 先按年月日的格式 建立文件夹,然后把一些比较重要的表进行备份。本人觉得大的备份,像整个数据库导出的,每几天或每个星期登陆phpmyadmin进行一次就行,没必要用脚本自动



Statement
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
MySQL: BLOB and other no-sql storage, what are the differences?MySQL: BLOB and other no-sql storage, what are the differences?May 13, 2025 am 12:14 AM

MySQL'sBLOBissuitableforstoringbinarydatawithinarelationaldatabase,whileNoSQLoptionslikeMongoDB,Redis,andCassandraofferflexible,scalablesolutionsforunstructureddata.BLOBissimplerbutcanslowdownperformancewithlargedata;NoSQLprovidesbetterscalabilityand

MySQL Add User: Syntax, Options, and Security Best PracticesMySQL Add User: Syntax, Options, and Security Best PracticesMay 13, 2025 am 12:12 AM

ToaddauserinMySQL,use:CREATEUSER'username'@'host'IDENTIFIEDBY'password';Here'showtodoitsecurely:1)Choosethehostcarefullytocontrolaccess.2)SetresourcelimitswithoptionslikeMAX_QUERIES_PER_HOUR.3)Usestrong,uniquepasswords.4)EnforceSSL/TLSconnectionswith

MySQL: How to avoid String Data Types common mistakes?MySQL: How to avoid String Data Types common mistakes?May 13, 2025 am 12:09 AM

ToavoidcommonmistakeswithstringdatatypesinMySQL,understandstringtypenuances,choosetherighttype,andmanageencodingandcollationsettingseffectively.1)UseCHARforfixed-lengthstrings,VARCHARforvariable-length,andTEXT/BLOBforlargerdata.2)Setcorrectcharacters

MySQL: String Data Types and ENUMs?MySQL: String Data Types and ENUMs?May 13, 2025 am 12:05 AM

MySQloffersechar, Varchar, text, Anddenumforstringdata.usecharforfixed-Lengthstrings, VarcharerForvariable-Length, text forlarger text, AndenumforenforcingdataAntegritywithaetofvalues.

MySQL BLOB: how to optimize BLOBs requestsMySQL BLOB: how to optimize BLOBs requestsMay 13, 2025 am 12:03 AM

Optimizing MySQLBLOB requests can be done through the following strategies: 1. Reduce the frequency of BLOB query, use independent requests or delay loading; 2. Select the appropriate BLOB type (such as TINYBLOB); 3. Separate the BLOB data into separate tables; 4. Compress the BLOB data at the application layer; 5. Index the BLOB metadata. These methods can effectively improve performance by combining monitoring, caching and data sharding in actual applications.

Adding Users to MySQL: The Complete TutorialAdding Users to MySQL: The Complete TutorialMay 12, 2025 am 12:14 AM

Mastering the method of adding MySQL users is crucial for database administrators and developers because it ensures the security and access control of the database. 1) Create a new user using the CREATEUSER command, 2) Assign permissions through the GRANT command, 3) Use FLUSHPRIVILEGES to ensure permissions take effect, 4) Regularly audit and clean user accounts to maintain performance and security.

Mastering MySQL String Data Types: VARCHAR vs. TEXT vs. CHARMastering MySQL String Data Types: VARCHAR vs. TEXT vs. CHARMay 12, 2025 am 12:12 AM

ChooseCHARforfixed-lengthdata,VARCHARforvariable-lengthdata,andTEXTforlargetextfields.1)CHARisefficientforconsistent-lengthdatalikecodes.2)VARCHARsuitsvariable-lengthdatalikenames,balancingflexibilityandperformance.3)TEXTisidealforlargetextslikeartic

MySQL: String Data Types and Indexing: Best PracticesMySQL: String Data Types and Indexing: Best PracticesMay 12, 2025 am 12:11 AM

Best practices for handling string data types and indexes in MySQL include: 1) Selecting the appropriate string type, such as CHAR for fixed length, VARCHAR for variable length, and TEXT for large text; 2) Be cautious in indexing, avoid over-indexing, and create indexes for common queries; 3) Use prefix indexes and full-text indexes to optimize long string searches; 4) Regularly monitor and optimize indexes to keep indexes small and efficient. Through these methods, we can balance read and write performance and improve database efficiency.

See all articles

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

SecLists

SecLists

SecLists is the ultimate security tester's companion. It is a collection of various types of lists that are frequently used during security assessments, all in one place. SecLists helps make security testing more efficient and productive by conveniently providing all the lists a security tester might need. List types include usernames, passwords, URLs, fuzzing payloads, sensitive data patterns, web shells, and more. The tester can simply pull this repository onto a new test machine and he will have access to every type of list he needs.

SublimeText3 English version

SublimeText3 English version

Recommended: Win version, supports code prompts!

Safe Exam Browser

Safe Exam Browser

Safe Exam Browser is a secure browser environment for taking online exams securely. This software turns any computer into a secure workstation. It controls access to any utility and prevents students from using unauthorized resources.

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

Atom editor mac version download

Atom editor mac version download

The most popular open source editor