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澳门新萄京官方网站:数量破坏还原与数据自动

2019-10-05 作者:数据库网络   |   浏览(194)

在测量试验备份还原时,使用XtraBackup还原数据库后,创设三个测验账号时遇上了上面错误:

排查修复数据表的经过:

排查修复数据表的经过:

确立机关备份脚本
在这里,为了使数据库教程备份和死灰复然的合乎大家的其实供给,用一段相符供给的Shell脚本来完成一体备份进程的自动化。
[[email protected] ~]# vi mysql教程-backup.sh  ← 创立数据库自动备份脚本,如下:

介绍数据库自动备份以及数据库被磨损后的还原的措施。在此地,大家运用mysqlhotcopy,而且定义一段Shell脚本来完结数据库的机关备份,并且,让一切数据自动备份与数据复苏进度都基于Shell。

 

1、访谈网页,提示错误,连接不到数据库。

1、访问网页,提示错误,连接不到数据库。

#!/bin/bash

创造数据库备份所需条件

 

**2、运转mysql服务,卸载和停业rpm安装的mysql服务

**2、运维mysql服务,卸载和关闭rpm安装的mysql服务

PATH=/usr/local/sbin:/usr/bin:/bin

[1] 创建机关备份脚本

mysql> grant all on house.* to test@'192.168.%' identified by 'test1249';

**(前日设置postfix好像yum安装了mysql),用netstat -anp |grep mysqld 命令查看mysql服务未有起来,用mysql -uroot -p也总是不到服务器。

**(今天设置postfix好像yum安装了mysql),用netstat -anp |grep mysqld 命令查看mysql服务未有起来,用mysql -uroot -p也再三再四不到服务器。

# The Directory of Backup
BACKDIR=/backup/mysql

在此间,为了使数据库备份和回复的合乎我们的莫过于供给,用一段切合要求的Shell脚本来达成整个备份进度的自动化。

ERROR 3009 (HY000): Column count of mysql.user is wrong. Expected 45, found

3、查看错误提醒:
110726 17:02:23 [ERROR] Can't open the mysql.plugin table. Please run mysql_upgrade to create it. 
110726 17:02:23 [ERROR] /usr/local/mysql/libexec/mysqld: Table './mysql/host' is marked as crashed and last (automatic?) repair failed 
110726 17:02:23 [ERROR] Fatal error: Can't open and lock privilege tables: Table './mysql/host' is marked as crashed and last (automatic?) repair failed 110726 17:02:23 mysqld_safe mysqld from pid file /var/lib/mysql/localhost.localdomain.pid ended 
110726 17:24:31 mysqld_safe Starting mysqld daemon with databases from /var/lib/mysql 
110726 17:24:31 [Warning] '--skip-locking' is deprecated and will be removed in a future release. Please use '--skip-external-locking' instead.
发觉提醒数据库表损坏。(./mysql/host)

3、查看错误提醒:
110726 17:02:23 [ERROR] Can't open the mysql.plugin table. Please run mysql_upgrade to create it. 
110726 17:02:23 [ERROR] /usr/local/mysql/libexec/mysqld: Table './mysql/host' is marked as crashed and last (automatic?) repair failed 
110726 17:02:23 [ERROR] Fatal error: Can't open and lock privilege tables: Table './mysql/host' is marked as crashed and last (automatic?) repair failed 110726 17:02:23 mysqld_safe mysqld from pid file /var/lib/mysql/localhost.localdomain.pid ended 
110726 17:24:31 mysqld_safe Starting mysqld daemon with databases from /var/lib/mysql 
110726 17:24:31 [Warning] '--skip-locking' is deprecated and will be removed in a future release. Please use '--skip-external-locking' instead.
发掘提示数据库表损坏。(./mysql/host)

# The Password of MySQL
ROOTPASS=********  此处请将星号替换来MySQL的root密码

 代码如下

  1. Created with MySQL 50620, now running 50721. Please use mysql_upgrade to fix this error.

4、修复数据库表

4、修复数据库表

# Remake the Directory of Backup
rm -rf $BACKDIR
mkdir -p $BACKDIR

复制代码

mysql>

cd /var/lib/mysql/mysql 
myisamchk -of host.MYI 

cd /var/lib/mysql/mysql 
myisamchk -of host.MYI 

# Get the Name of Database
DBLIST=`ls -p /var/lib/mysql | grep / | tr -d /`

[[email protected] ~]# vi mysql-backup.sh ← 创立数据库自动备份脚本,如下:
#!/bin/bash
PATH=/usr/local/sbin:/usr/bin:/bin
# The Directory of Backup
BACKDIR=/backup/mysql
# The Password of MySQL
ROOTPASS=******** 此处请将星号替换来MySQL的root密码
# Remake the Directory of Backup
rm -rf $BACKDIR
mkdir -p $BACKDIR
# Get the Name of Database
DBLIST=`ls -p /var/lib/mysql | grep / | tr -d /`
# Backup with Database
for dbname in $DBLIST
do
mysqlhotcopy $dbname -u root -p $ROOTPASS $BACKDIR | logger -t mysqlhotcopy
done

 

  • recovering (with keycache) MyISAM-table 'host.MYI' 
    Data records: 0 
    表host.MYI修复成功。
  • recovering (with keycache) MyISAM-table 'host.MYI' 
    Data records: 0 
    表host.MYI修复成功。

# Backup with Database
for dbname in $DBLIST
do
mysqlhotcopy $dbname -u root -p $ROOTPASS $BACKDIR | logger -t mysqlhotcopy
done

[2] 运营数据库自动备份脚本

 

5、再度运行服务,查看服务是不是运转,登入mysql,依然不行。所以再一次查看错误日志。
/usr/local/mysql/libexec/mysqld: Table './mysql/plugin' is marked as crashed and last (automatic?) repair failed 
/usr/local/mysql/libexec/mysqld: Table 'plugin' is marked as crashed and last (automatic?) repair failed 
110726 17:24:31 [ERROR] Can't open the mysql.plugin table. Please run mysql_upgrade to create it. 
110726 17:24:31 [ERROR] /usr/local/mysql/libexec/mysqld: Table './mysql/user' is marked as crashed and last (automatic?) repair failed 
110726 17:24:31 [ERROR] Fatal error: Can't open and lock privilege tables: Table './mysql/user' is marked as crashed and last (automatic?) repair failed 110726 17:24:31 mysqld_safe mysqld from pid file /var/lib/mysql/localhost.localdomain.pid ended 
110726 17:27:13 mysqld_safe Starting mysqld daemon with databases from /var/lib/mysql 
110726 17:27:13 [Warning] '--skip-locking' is deprecated and will be removed in a future release. Please use '--skip-external-locking' instead.

5、再一次启航服务,查看服务是或不是运营,登陆mysql,如故不行。所以重复翻开错误日志。
/usr/local/mysql/libexec/mysqld: Table './mysql/plugin' is marked as crashed and last (automatic?) repair failed 
/usr/local/mysql/libexec/mysqld: Table 'plugin' is marked as crashed and last (automatic?) repair failed 
110726 17:24:31 [ERROR] Can't open the mysql.plugin table. Please run mysql_upgrade to create it. 
110726 17:24:31 [ERROR] /usr/local/mysql/libexec/mysqld: Table './mysql/user' is marked as crashed and last (automatic?) repair failed 
110726 17:24:31 [ERROR] Fatal error: Can't open and lock privilege tables: Table './mysql/user' is marked as crashed and last (automatic?) repair failed 110726 17:24:31 mysqld_safe mysqld from pid file /var/lib/mysql/localhost.localdomain.pid ended 
110726 17:27:13 mysqld_safe Starting mysqld daemon with databases from /var/lib/mysql 
110726 17:27:13 [Warning] '--skip-locking' is deprecated and will be removed in a future release. Please use '--skip-external-locking' instead.

[2] 运转数据库自动备份脚本
[[email protected] ~]# chmod 700 mysql-backup.sh  改动脚本属性,让其只好让root客商施行
[[email protected] ~]# ./mysql-backup.sh   运维脚本
[[email protected] ~]# ls -l /backup/mysql/   确认一下是还是不是备份成功
total 8
drwxr-x--- 2 mysql mysql 4096 Sep 1 16:54 mysql   已成功备份到/backup/mysql目录中

 代码如下

因为备份的数据库版本为MySQL 5.6.20,指标数据库的MySQL版本为5.7.21,因为四个数据库版本不均等,在还原过后,忘记晋级数据库(还原后未有使用mysql_upgrade进级数据结构)。其实从错误音信也能收看一二,须要实践mysql_upgrade命令会检查有着数据库中的全体表与当下版本的MySQL服务器是还是不是不相称。 mysql_upgrade还只怕会进级系统表,以便你能够运用部分新特征或效果与利益。

6、又发现./mysql/user表损坏。
[root@localhost mysql]# myisamchk -of user.MYI 

6、又发现./mysql/user表损坏。
[[email protected] mysql]# myisamchk -of user.MYI 

[3] 让数据库备份脚本每一日活动运转
[[email protected] ~]# crontab -e  ← 编辑自动运营准绳(然后会出现编辑窗口,操作同vi)
00 03 * * * /root/mysql-backup.sh   加多这一行到文件中,让数据库备份每日中午3点开展

复制代码

 

  • recovering (with keycache) MyISAM-table 'user.MYI' 
    Data records: 6
  • recovering (with keycache) MyISAM-table 'user.MYI' 
    Data records: 6

[1] 当数据库被删去后的回复措施
率先成立二个测量试验用的数据库。
[[email protected] ~]# mysql -u root -p   ← 用root登录到MySQL服务器
Enter password:  ← 输入MySQL的root客商密码
Welcome to the MySQL monitor. Commands end with ; or g.
Your MySQL connection id is 8 to server version: 4.1.20

[[email protected] ~]# chmod 700 mysql-backup.sh 退换脚本属性,让其只好让root顾客施行
[[email protected] ~]# ./mysql-backup.sh 运营脚本
[[email protected] ~]# ls -l /backup/mysql/ 确认一下是否备份成功
total 8
drwxr-x--- 2 mysql mysql 4096 Sep 1 16:54 mysql 已成功备份到/backup/mysql目录中

 

**7、表修复成功,但是依旧起步不了服务,继续看错误日志。

**7、表修复成功,不过仍然起步不了服务,继续看错误日志。

Type 'help;' or 'h' for help. Type 'c' to clear the buffer.

[3] 让数据库备份脚本天天活动运维

#  mysql_upgrade -u root -p

Enter password: 

Checking if update is needed.

Checking server version.

Running queries to upgrade MySQL server.

Checking system database.

mysql.columns_priv                                 OK

mysql.db                                           OK

mysql.db_database_info                             OK

mysql.db_instance_info                             OK

mysql.db_server_info                               OK

mysql.engine_cost                                  OK

......................................................

......................................................

Upgrade process completed successfully.

Checking if update is needed.

**/usr/local/mysql/libexec/mysqld: Table './mysql/plugin' is marked as crashed and last (automatic?) repair failed 
/usr/local/mysql/libexec/mysqld: Table 'plugin' is marked as crashed and last (automatic?) repair failed 
110726 17:27:13 [ERROR] Can't open the mysql.plugin table. Please run mysql_upgrade to create it. 
110726 17:27:13 [ERROR] /usr/local/mysql/libexec/mysqld: Table './mysql/db' is marked as crashed and last (automatic?) repair failed 
110726 17:27:13 [ERROR] Fatal error: Can't open and lock privilege tables: Table './mysql/db' is marked as crashed and last (automatic?) repair failed 
110726 17:27:13 mysqld_safe mysqld from pid file /var/lib/mysql/localhost.localdomain.pid ended

**/usr/local/mysql/libexec/mysqld: Table './mysql/plugin' is marked as crashed and last (automatic?) repair failed 
/usr/local/mysql/libexec/mysqld: Table 'plugin' is marked as crashed and last (automatic?) repair failed 
110726 17:27:13 [ERROR] Can't open the mysql.plugin table. Please run mysql_upgrade to create it. 
110726 17:27:13 [ERROR] /usr/local/mysql/libexec/mysqld: Table './mysql/db' is marked as crashed and last (automatic?) repair failed 
110726 17:27:13 [ERROR] Fatal error: Can't open and lock privilege tables: Table './mysql/db' is marked as crashed and last (automatic?) repair failed 
110726 17:27:13 mysqld_safe mysqld from pid file /var/lib/mysql/localhost.localdomain.pid ended

mysql> create database test;  ← 创设一个测量试验用的数据库test
Query OK, 1 row affected (0.00 sec)

[[email protected] ~]# crontab -e ← 编辑自动运营准则(然后会现出编辑窗口,操作同vi)
00 03 * * * /root/mysql-backup.sh 增加这一行到文件中,让数据库备份每日晚上3点扩充

 

8、最后叁个错误,是./mysql/db表还并未有修复好持续修复./mysql/db表。

8、最终贰个荒谬,是./mysql/db表还未有修复好持续修复./mysql/db表。

mysql> use test  ← 连接到那个数据库
Database changed

 

 

9、推行上边的授命修复./mysql/db表:
[root@localhost mysql]# myisamchk -of db.MYI 

9、实施下边包车型客车一声令下修复./mysql/db表:
[[email protected] mysql]# myisamchk -of db.MYI 

mysql> create table test(num int, name varchar(50));  ← 在数据库中国建工业总会公司立四个表
Query OK, 0 rows affected (0.07 sec)

测量试验活动备份经常运维与否(备份恢复生机的方式)

关于mysql_upgrade的法定介绍如下,具体细节仿照效法“4.4.7 mysql_upgrade — Check and Upgrade MySQL Tables”:

  • recovering (with keycache) MyISAM-table 'db.MYI' 
    Data records: 0 
    Data records: 2
  • recovering (with keycache) MyISAM-table 'db.MYI' 
    Data records: 0 
    Data records: 2

mysql> insert into test values(1,'Hello,CentOS');  ← 插入三个值到那几个表(这里以“Hello,CentOS”为例)
Query OK, 1 row affected (0.02 sec)

此间,以通超过实际操的历程来介绍难点现身后的上升措施。

 

10、最后运转mysql服务。
/usr/local/mysql/bin/mysqld_safe &

10、最后运行mysql服务。
/usr/local/mysql/bin/mysqld_safe &

mysql> select * from test;  ← 查看数据库中的内容
------ -----------------
| num | name |
------ -----------------
|1  | Hello,Centos |  ← 确认刚刚插入到表中的值的留存
------ ------------------
1 row in set (0.01 sec)

[1] 当数据库被剔除后的复原措施

 

11、查看服务是还是不是在运维。
[root@localhost ~]# netstat -anp | grep mysqld 
tcp0  0  
0.0.0.0:3306 
0.0.0.0:*   LISTEN
4360/mysqld  
unix  2  [ ACC ] STREAM LISTENING 14172
4360/mysqld /tmp/mysql.sock
此时发掘服务已运转。

澳门新萄京官方网站:数量破坏还原与数据自动备份,mysql数据库自动备份且复苏破坏数据情势。11、查看服务是或不是在运作。
[[email protected] ~]# netstat -anp | grep mysqld 
tcp0  0  
0.0.0.0:3306 
0.0.0.0:*   LISTEN
4360/mysqld  
unix  2  [ ACC ] STREAM LISTENING 14172
4360/mysqld /tmp/mysql.sock
这时候开采服务已运转。

mysql> exit  ← 退出MySQL服务器
Bye

率先成立八个测量检验用的数据库。

 

12、登录mysql试试。
[root@localhost ~]# mysql -uroot -p123456 
Welcome to the MySQL monitor.  Commands end with ; or g. 
Your MySQL connection id is 35 
Server version: 5.1.55-log Source distribution 
Copyright (c) 2000, 2010, Oracle and/or its affiliates. All rights reserved. 
This software comes with ABSOLUTELY NO WARRANTY. This is free software, 
and you are welcome to modify and redistribute it under the GPL v2 license 
Type 'help;' or 'h' for help. Type 'c' to clear the current input statement. 
mysql> 
能够登陆。

12、登录mysql试试。
[[email protected] ~]# mysql -uroot -p123456 
Welcome to the MySQL monitor.  Commands end with ; or g. 
Your MySQL connection id is 35 
Server version: 5.1.55-log Source distribution 
Copyright (c) 2000, 2010, Oracle and/or its affiliates. All rights reserved. 
This software comes with ABSOLUTELY NO WARRANTY. This is free software, 
and you are welcome to modify and redistribute it under the GPL v2 license 
Type 'help;' or 'h' for help. Type 'c' to clear the current input statement. 
mysql> 
能够登入。

接下来,运营刚才创建的数据库备份脚本,备份刚刚确立的测验用的数据库。
[[email protected] ~]# cd ← 回到脚本所在的root客户的根目录
[[email protected] ~]# ./mysql-backup.sh  ← 运营脚本进行数据库备份

 代码如下

mysql_upgrade examines all tables in all databases for incompatibilities with the current version of MySQL Server. mysql_upgrade also upgrades the system tables so that you can take advantage of new privileges or capabilities that might have been added.

13、展开网页,已经能够健康访谈了,表明MySQL数据库的数据表修复成功。

13、张开网页,已经足以平常访谈了,表明MySQL数据库的数据表修复成功。

接下去,大家再度登入到MySQL服务器中,删除刚刚确立的测验用的数据库test,以便于测量试验数据恢复生机能还是不可能成功。
[[email protected] ~]# mysql -u root -p  ← 用root登录到MySQL服务器
Enter password:  ← 输入MySQL的root客商密码
Welcome to the MySQL monitor. Commands end with ; or g.
Your MySQL connection id is 13 to server version: 4.1.20

复制代码

If mysql_upgrade finds that a table has a possible incompatibility, it performs a table check and, if problems are found, attempts a table repair. If the table cannot be repaired, see Section 2.11.3, “Rebuilding or Repairing Tables or Indexes” for manual table repair strategies.

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1、访谈网页,提示错误,连接不到数据库。 2、运维mysql服务,卸载和倒闭rpm安装的mysql服务 (后日设置postfix好像...

Type 'help;' or 'h' for help. Type 'c' to clear the buffer.

[[email protected] ~]# mysql -u root -p ← 用root登录到MySQL服务器
Enter password: ← 输入MySQL的root客户密码
Welcome to the MySQL monitor. Commands end with ; or g.
Your MySQL connection id is 8 to server version: 4.1.20
Type 'help;' or 'h' for help. Type 'c' to clear the buffer.
mysql> create database test; ← 建立四个测量试验用的数据库test
Query OK, 1 row affected (0.00 sec)
mysql> use test ← 连接到那些数据库
Database changed
mysql> create table test(num int, name varchar(50)); ← 在数据库中创建四个表
Query OK, 0 rows affected (0.07 sec)
mysql> insert into test values(1,'Hello,CentOS'); ← 插入三个值到那么些表(这里以“Hello,CentOS”为例)
Query OK, 1 row affected (0.02 sec)
mysql> select * from test; ← 查看数据库中的内容
------ -----------------
| num | name |
------ -----------------
|1 | Hello,Centos | ← 确认刚刚插入到表中的值的存在
------ ------------------
1 row in set (0.01 sec)
mysql> exit ← 退出MySQL服务器
Bye

You should execute mysql_upgrade each time you upgrade MySQL.

mysql> use test  ← 连接到测量试验用的test数据库
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A

接下来,运营刚才创建的数据库备份脚本,备份刚刚确立的测量试验用的数据库。

 

Database changed
mysql> drop table test;  ← 删除数据中的表
Query OK, 0 rows affected (0.04 sec)

[[email protected] ~]# cd ← 回到脚本所在的root客户的根目录
[[email protected] ~]# ./mysql-backup.sh ← 运营脚本进行数据库备份

 

mysql> drop database test;  ← 删除测量检验用数据库test
Query OK, 0 rows affected (0.01 sec)

接下去,大家重新登陆到MySQL服务器中,删除刚刚创立的测量试验用的数据库test,以便于测验数据复苏能不能打响。

 

mysql> show databases;
---------------
| Database |
---------------
| mysql |  ← 确认测验用的test数据库已空中楼阁、已被删去
---------------
1 row in set (0.01 sec)

 代码如下

参谋资料:

mysql> exit  ← 退出MySQL服务器
Bye

复制代码

 

以上,我们就非常模拟了数据库被毁掉的长河。接下来,是数据库被“破坏”后,用备份进行苏醒的办法。
[[email protected] ~]# /bin/cp -Wranglerf /backup/mysql/test/ /var/lib/mysql/  ← 复制备份的数据库test到相应目录
[[email protected] ~]# chown -兰德酷路泽 mysql:mysql /var/lib/mysql/test/  ← 改换数据库test的归属为mysql
[[email protected] ~]# chmod 700 /var/lib/mysql/test/  ← 改造数据库目录属性为700
[[email protected] ~]# chmod 660 /var/lib/mysql/test/*  ← 改造数据库中数据的脾性为660

[[email protected] ~]# mysql -u root -p ← 用root登录到MySQL服务器
Enter password: ← 输入MySQL的root客户密码
Welcome to the MySQL monitor. Commands end with ; or g.
Your MySQL connection id is 13 to server version: 4.1.20
Type 'help;' or 'h' for help. Type 'c' to clear the buffer.
mysql> use test ← 连接到测量试验用的test数据库
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A
Database changed
mysql> drop table test; ← 删除数据中的表
Query OK, 0 rows affected (0.04 sec)
mysql> drop database test; ← 删除测量试验用数据库test
Query OK, 0 rows affected (0.01 sec)
mysql> show databases;
---------------
| Database |
---------------
| mysql | ← 确认测量试验用的test数据库已空头支票、已被去除
---------------
1 row in set (0.01 sec)
mysql> exit ← 退出MySQL服务器
Bye

下一场,再度登陆到MySQL服务器上,看是不是曾经成功恢复生机了数据库。
[[email protected] ~]# mysql -u root -p  ← 用root登录到MySQL服务器
Enter password:  ← 输入MySQL的root客商密码
Welcome to the MySQL monitor. Commands end with ; or g.
Your MySQL connection id is 14 to server version: 4.1.20

上述,大家就相当于模拟了数据库被破坏的经过。接下来,是数据库被“破坏”后,用备份实行理并答复原的措施。

Type 'help;' or 'h' for help. Type 'c' to clear the buffer.

[[email protected] ~]# /bin/cp -汉兰达f /backup/mysql/test/ /var/lib/mysql/ ← 复制备份的数据库test到相应目录
[[email protected] ~]# chown -路虎极光 mysql:mysql /var/lib/mysql/test/ ← 改造数据库test的着落为mysql
[[email protected] ~]# chmod 700 /var/lib/mysql/test/ ← 退换数据库目录属性为700
[[email protected] ~]# chmod 660 /var/lib/mysql/test/* ← 改换数据库中数量的性质为660

mysql> show databases;  ← 查看当前留存的数据库
-------------
| Database |
-------------
| mysql |
| test  |  ← 确认刚刚被删除的test数据库已经成功被复苏回来!
------------
2 rows in set (0.00 sec)

接下来,再次登录到MySQL服务器上,看是否已经成功恢复生机了数据库。

mysql> use test  ← 连接到test数据库
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A

 代码如下

Database changed
mysql> show tables;  ← 查看test数据库中留存的表
-------------------
| Tables_in_test |
-------------------
| test  |
-------------------
1 row in set (0.00 sec)

复制代码

mysql> select * from test;  ← 查看数据库中的内容
------ ---------------------
| num | name  |
------ ---------------------
| 1 | Hello,CentOS |  ← 确认数据表中的从头到尾的经过与删除前定义的“Hello,CentOS”同样!
------ ---------------------
1 row in set (0.01 sec)

[[email protected] ~]# mysql -u root -p ← 用root登录到MySQL服务器
Enter password: ← 输入MySQL的root顾客密码
Welcome to the MySQL monitor. Commands end with ; or g.
Your MySQL connection id is 14 to server version: 4.1.20
Type 'help;' or 'h' for help. Type 'c' to clear the buffer.
mysql> show databases; ← 查看当前留存的数据库
-------------
| Database |
-------------
| mysql |
| test | ← 确认刚刚被去除的test数据库已经打响被还原回来!
------------
2 rows in set (0.00 sec)
mysql> use test ← 连接到test数据库
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A
Database changed
mysql> show tables; ← 查看test数据库中留存的表
-------------------
| Tables_in_test |
-------------------
| test |
-------------------
1 row in set (0.00 sec)
mysql> select * from test; ← 查看数据库中的内容
------ ---------------------
| num | name |
------ ---------------------
| 1 | Hello,CentOS | ← 确认数据表中的剧情与删除前定义的“Hello,CentOS”一样!
澳门新萄京官方网站, ------ ---------------------
1 row in set (0.01 sec)
mysql> exit ← 退出MySQL服务器
Bye

mysql> exit  ← 退出MySQL服务器
Bye

上述结果表示,数据库被删除后,用备份后的数据库成功的将数据苏醒到了去除前的处境

切实和地点所述的“数据库被删去后的重作冯妇措施”周围似。这里,测量检验用数据库接着使用刚刚在前面用过的test。这里为了使刚刚接触数据库的意中人不至于通晓混乱,大家再一次登陆到MySQL服务器上料定一下刚好确立的测验用的数据库test的连锁音讯。
[[email protected] ~]# mysql -u root -p  ← 用root登录到MySQL服务器
Enter password:  ← 输入MySQL的root客商密码
Welcome to the MySQL monitor. Commands end with ; or g.
Your MySQL connection id is 14 to server version: 4.1.20

 

Type 'help;' or 'h' for help. Type 'c' to clear the buffer.

2] 当数据库被修改后的回复措施

mysql> show databases;  ← 查看当前存在的数据库
-------------
| Database |
-------------
| mysql |
| test  |
------------
2 rows in set (0.00 sec)

数据库被改变,恐怕存在着多地点的原由,被入侵、以及相应程序存在Bug等等,这里不作详细介绍。这里将只介绍在数据库被改变后,要是苏醒到被涂改前景况的艺术。

mysql> use test  ← 连接到test数据库
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A

切实和地点所述的“数据库被剔除后的过来措施”相相近。这里,测验用数据库接着使用刚刚在前边用过的test。这里为了使刚刚接触数据库的意中人不至于精通混乱,我们再一次登入到MySQL服务器上确认一下恰恰确立的测量检验用的数据库test的连带音讯。

Database changed
mysql> show tables;  ← 查看test数据库中留存的表
-------------------
| Tables_in_test |
-------------------
| test  |
-------------------
1 row in set (0.00 sec)

 代码如下

mysql> select * from test;  ← 查看数据库中的内容
------ --------------------
| num | name  |
------ --------------------
| 1 | Hello,CentOS|
------ --------------------
1 row in set (0.01 sec)

复制代码

mysql> exit  ← 退出MySQL服务器
Bye

[[email protected] ~]# mysql -u root -p ← 用root登录到MySQL服务器
Enter password: ← 输入MySQL的root客商密码
Welcome to the MySQL monitor. Commands end with ; or g.
Your MySQL connection id is 14 to server version: 4.1.20
Type 'help;' or 'h' for help. Type 'c' to clear the buffer.
mysql> show databases; ← 查看当前设有的数据库
-------------
| Database |
-------------
| mysql |
| test |
------------
2 rows in set (0.00 sec)
mysql> use test ← 连接到test数据库
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A
Database changed
mysql> show tables; ← 查看test数据库中设有的表
-------------------
| Tables_in_test |
-------------------
| test |
-------------------
1 row in set (0.00 sec)
mysql> select * from test; ← 查看数据库中的内容
------ --------------------
| num | name |
------ --------------------
| 1 | Hello,CentOS|
------ --------------------
1 row in set (0.01 sec)
mysql> exit ← 退出MySQL服务器
Bye

接下来,我们再度运营数据库备份脚本,将近来事态的数据库,再做三遍备份。
[[email protected] ~]# cd  ← 回到脚本所在的root客商的根目录
[[email protected] ~]# ./mysql-backup.sh  ← 运维脚本进行数据库备份

然后,我们重国民党的新生活运动行数据库备份脚本,将前段时间情况的数据库,再做一遍备份。

接下去,我们再度登入到MySQL服务器中,对测量试验用的数据库test实行部分修改,以便于测验数据苏醒能无法成功。
[[email protected] ~]# mysql -u root -p  ← 用root登录到MySQL服务器
Enter password:  ← 输入MySQL的root客户密码
Welcome to the MySQL monitor. Commands end with ; or g.
Your MySQL connection id is 15 to server version: 4.1.20

[[email protected] ~]# cd ← 回到脚本所在的root客商的根目录
[[email protected] ~]# ./mysql-backup.sh ← 运转脚本实行数据库备份

Type 'help;' or 'h' for help. Type 'c' to clear the buffer.

接下去,大家再次登入到MySQL服务器中,对测量试验用的数据库test举香港行政局地改造,以便于测验数据苏醒能不可能得逞。

mysql> use test  ← 连接到test数据库
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A

 代码如下

Database changed
mysql> update test set name='Shit,Windows';  ← 然后将test中表的值重新定义为“Shit,Windows”(原本为“Hello,CentOS”)
Query OK, 1 row affected (0.07 sec)
Rows matched: 1 Changed: 1 Warnings: 0

复制代码

mysql> select * from test;  ← 确认test中的表被定义的值
------ --------------------
| num | name  |
------ -------------------
| 1 | Shit,Windows |  ← 确认已经将原test数据库表中的值修改为新的值“Shit,Windows”
------ -------------------
1 row in set (0.00 sec)

[[email protected] ~]# mysql -u root -p ← 用root登录到MySQL服务器
Enter password: ← 输入MySQL的root客商密码
Welcome to the MySQL monitor. Commands end with ; or g.
Your MySQL connection id is 15 to server version: 4.1.20
Type 'help;' or 'h' for help. Type 'c' to clear the buffer.
mysql> use test ← 连接到test数据库
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A
Database changed
mysql> update test set name='Shit,Windows'; ← 然后将test中表的值重新定义为“Shit,Windows”(原本为“Hello,CentOS”)
Query OK, 1 row affected (0.07 sec)
Rows matched: 1 Changed: 1 Warnings: 0
mysql> select * from test; ← 确认test中的表被定义的值
------ --------------------
| num | name |
------ -------------------
| 1 | Shit,Windows | ← 确认已经将原test数据库表中的值修改为新的值“Shit,Windows”
------ -------------------
1 row in set (0.00 sec)
mysql> exit ← 退出MySQL服务器
Bye

mysql> exit  ← 退出MySQL服务器
Bye

上述,我们就极其模拟了数据库被篡改的进度。接下来,是数据库被“篡改”后,用备份进行苏醒的格局。

上述,大家就非常模拟了数据库被篡改的经过。接下来,是数据库被“篡改”后,用备份实行还原的秘诀。
[[email protected] ~]# /bin/cp -Wranglerf /backup/mysql/test/ /var/lib/mysql/  ← 复制备份的数据库test到对应目录

[[email protected] ~]# /bin/cp -兰德酷路泽f /backup/mysql/test/ /var/lib/mysql/ ← 复制备份的数据库test到相应目录

然后,再一次登入到MySQL服务器上,看数据库是不是被苏醒到了被“篡改”在此以前的意况。
[[email protected] ~]# mysql -u root -p  ← 用root登录到MySQL服务器
Enter password:  ← 输入MySQL的root客户密码
Welcome to the MySQL monitor. Commands end with ; or g.
Your MySQL connection id is 16 to server version: 4.1.20

下一场,再一次登陆到MySQL服务器上,看数据库是或不是被还原到了被“篡改”在此之前的意况。

Type 'help;' or 'h' for help. Type 'c' to clear the buffer.

 代码如下

mysql> use test  ← 连接到test数据库
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A

复制代码

Database changed
mysql> select * from test;  ← 查看数据库中的内容
------ ----------------
| num | name  |
------ ----------------
| 1| Hello,CentOS | ← 确认数据表中的源委与被涂改前定义的“Hello,CentOS”同样!
------ ----------------
1 row in set (0.01 sec)

[[email protected] ~]# mysql -u root -p ← 用root登录到MySQL服务器
Enter password: ← 输入MySQL的root客商密码
Welcome to the MySQL monitor. Commands end with ; or g.
Your MySQL connection id is 16 to server version: 4.1.20
Type 'help;' or 'h' for help. Type 'c' to clear the buffer.
mysql> use test ← 连接到test数据库
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A
Database changed
mysql> select * from test; ← 查看数据库中的内容
------ ----------------
| num | name |
------ ----------------
| 1| Hello,CentOS | ← 确认数据表中的内容与被修改前定义的“Hello,CentOS”同样!
------ ----------------
1 row in set (0.01 sec)
mysql> exit ← 退出MySQL服务器
Bye

mysql> exit  ← 退出MySQL服务器
Bye

如上结果表示,数据库被改动后,用备份后的数据库成功的将数据苏醒到了被“篡改”前的气象。

以上结果表示,数据库被修改后,用备份后的数据库成功的将数据复苏到了被“篡改”前的意况。
测试后…
测量试验完了后,将测验用过的残存音信删除。
[[email protected] ~]# mysql -u root -p  ← 用root登录到MySQL服务器
Enter password:  ← 输入MySQL的root客商密码
Welcome to the MySQL monitor. Commands end with ; or g.
Your MySQL connection id is 19 to server version: 4.1.20

测试后…

Type 'help;' or 'h' for help. Type 'c' to clear the buffer.

测验完了后,将测验用过的残存音讯删除。

mysql> use test  ← 连接到test数据库
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A

 代码如下

Database changed
mysql> drop table test;  ← 删除test数据库中的表
Query OK, 0 rows affected (0.01 sec)

复制代码

mysql> drop database test;  ← 删除测验用数据库test
Query OK, 0 rows affected (0.00 sec)

[[email protected] ~]# mysql -u root -p ← 用root登录到MySQL服务器
Enter password: ← 输入MySQL的root客商密码
Welcome to the MySQL monitor. Commands end with ; or g.
Your MySQL connection id is 19 to server version: 4.1.20
Type 'help;' or 'h' for help. Type 'c' to clear the buffer.
mysql> use test ← 连接到test数据库
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A
Database changed
mysql> drop table test; ← 删除test数据库中的表
Query OK, 0 rows affected (0.01 sec)
mysql> drop database test; ← 删除测量试验用数据库test
Query OK, 0 rows affected (0.00 sec)
mysql> show databases; ← 查看当前留存的数据库
-------------
| Database |
-------------
| mysql | ← 确认测验用数据库test子虚乌有、已被去除
-------------
1 row in set (0.00 sec)
mysql> exit ← 退出MySQL服务器
Bye

mysql> show databases;  ← 查看当前留存的数据库
-------------
| Database |
-------------
| mysql |  ← 确认测验用数据库test子虚乌有、已被删除
-------------
1 row in set (0.00 sec)

如上介绍了用大家友好树立的一段Shell脚本,通过mysqlhotcopy来备份数据库的措施。

mysql> exit  ← 退出MySQL服务器
Bye

对此大多私有爱好者来讲,营造服务器大概不是很思索数据被毁坏以及数据被毁损后的过来职业。但必需说,对于服务器来讲,数据破坏后的卷土而来成效也是差距业余和正式的元素之一。所以小编建议,在您布置好了Web服务器以及MySQL服务器等等的时候,千万不要操之过切使用它,而要想办法在轻松的(硬件、软件)条件下使它“安于盘石”之后,再思虑使用的主题材料。

 

...

在那边,为了使数据库教程备份和回复的合乎大家的实在供给,用一段相符须要的Shell脚本来达成任何备份进度的活动化...

本文由澳门新萄京官方网站发布于数据库网络,转载请注明出处:澳门新萄京官方网站:数量破坏还原与数据自动

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