MySQL数据库的自动备份与数据库被破坏后的恢复（2）

[root@CentOS ~]# mysql -u root -p ← 用root登录到MySQL服务器

Enter password: ← 输入MySQL的root用户密码

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; ← 建立一个测试用的数据库test

Query OK, 1 row affected (0.00 sec)

mysql> use test ← 连接到这个数据库

Database changed

mysql> create table test(num int, name varchar(50)); ← 在数据库中建立一个表

Query OK, 0 rows affected (0.07 sec)

mysql> insert into test values(1,'Hello,CentOS'); ← 插入一个值到这个表（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

[root@Centos ~]# mysql -u root -p ← 用root登录到MySQL服务器

Enter password: ← 输入MySQL的root用户密码

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 ← 连接到测试用的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; ← 删除测试用数据库test

Query OK, 0 rows affected (0.01 sec)

mysql> show databases;

+---------------+

| Database |

+---------------+

| mysql | ← 确认测试用的test数据库已不存在、已被删除

+---------------+

1 row in set (0.01 sec)

mysql> exit ← 退出MySQL服务器

Bye

[root@Centos ~]# /bin/cp -Rf /backup/mysql/test/ /var/lib/mysql/ ← 复制备份的数据库test到相应目录

[root@Centos ~]# chown -R mysql:mysql /var/lib/mysql/test/ ← 改变数据库test的归属为mysql

[root@Centos ~]# chmod 700 /var/lib/mysql/test/ ← 改变数据库目录属性为700

[root@Centos ~]# chmod 660 /var/lib/mysql/test/* ← 改变数据库中数据的属性为660

[root@CentOS ~]# mysql -u root -p ← 用root登录到MySQL服务器

Enter password: ← 输入MySQL的root用户密码

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; ← 查看当前存在的数据库

+-------------+

| Database |

+-------------+

| mysql |

| test | ← 确认刚刚被删除的test数据库已经成功被恢复回来！

+------------+

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数据库中存在的表

+-------------------+

| 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 | ← 确认数据表中的内容与删除前定义的“Hello,CentOS”一样！

+------+---------------------+

1 row in set (0.01 sec)

mysql> exit ← 退出MySQL服务器

Bye