Dependencies Resolved

=============================================================================
Package Arch Version Repository Size
=============================================================================
Installing:
mysql-server i386 4.1.20-1.RHEL4.1 update 9.8 M
Installing for dependencies:
mysql i386 4.1.20-1.RHEL4.1 update 2.9 M
perl-DBD-MySQL i386 2.9004-3.1 base 111 k
perl-DBI i386 1.40-8 base 466 k

Transaction Summary
=============================================================================
Install 4 Package(s)
Update 0 Package(s)
Remove 0 Package(s)
Total download size: 13 M
Downloading Packages:
(1/4): perl-DBD-MySQL-2.9 100% |=========================| 111 kB 00:00
(2/4): mysql-server-4.1.2 100% |=========================| 9.8 MB 00:11
(3/4): mysql-4.1.20-1.RHE 100% |=========================| 2.9 MB 00:03
(4/4): perl-DBI-1.40-8.i3 100% |=========================| 466 kB 00:01
Running Transaction Test
Finished Transaction Test
Transaction Test Succeeded
Running Transaction
Installing: perl-DBI ######################### [1/4]
Installing: mysql ######################### [2/4]
Installing: perl-DBD-MySQL ######################### [3/4]
Installing: mysql-server ######################### [4/4]

Dependencies Resolved

=============================================================================
Package Arch Version Repository Size
=============================================================================
Installing:
php-mysql i386 4.3.9-3.15 update 35 k

Transaction Summary
=============================================================================
Install 1 Package(s)
Update 0 Package(s)
Remove 0 Package(s)
Total download size: 35 k
Downloading Packages:
(1/1): php-mysql-4.3.9-3. 100% |=========================| 35 kB 00:00
Running Transaction Test
Finished Transaction Test
Transaction Test Succeeded
Running Transaction
Installing: php-mysql ######################### [1/1]

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

mysql> select user,host,password from mysql.user;　 ← 查看用戶信息
+------+------------------------------+---------------+
| user | host 　　　　　　　　　| password　|
+------+------------------------------+---------------+
| root | localhost　　　　 　　　| 　　　　　　|　 ← root密碼為空 
| root | sample.centospub.com　 |　　　　　　 |　 ← root密碼為空
|　　　| sample.centospub.com | 　　　　　　|
|　　　| localhost　　　　　　 | 　　　　　　|
+------+------------------------------+---------------+
4 rows in set (0.00 sec)

mysql> set password for root@localhost=password('在這里填入root密碼');　 ← 設(shè)置root密碼
Query OK, 0 rows affected (0.01 sec)

mysql> set password for root@'sample.centospub.com'=password('在這里填入root密碼');　 ← 設(shè)置root密碼
Query OK, 0 rows affected (0.01 sec)

mysql> select user,host,password from mysql.user;　 ← 查看用戶信息
+------+--------------------------------+--------------------------+
| user | host　　　　　　　　　　| password　　 　　|
+------+--------------------------------+--------------------------+
| root | localhost　　　　　　　　| 19b68057189b027f |　 ← root密碼被設(shè)置
| root | sample.centospub.com　　 | 19b68057189b027f |　 ← root密碼被設(shè)置
| 　　 | sample.centospub.com　　 | 　　　　　　　　　|
| 　　 | localhost　　　　　　　　|　　　　　　　　　 |
+------+--------------------------------+--------------------------+
4 rows in set (0.01 sec)

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

mysql> exit
Bye

[root@sample ~]# mysql -u root -h sample.centospub.com -p　 ← 通過密碼用root登錄
Enter password:　 ← 在這里輸入密碼

Welcome to the MySQL monitor. Commands end with ; or \g.　 ← 確認(rèn)用密碼能夠成功登錄
Your MySQL connection id is 6 to server version: 4.1.20

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

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

mysql> select user,host from mysql.user;　 ← 查看用戶信息
+------+----------------------------+
| user | host　　　　　　　　 |
+------+----------------------------+
|　　　| localhost 　　　　　　|

|　　　| 127.0.0.1 　　　　　　|
| root | localhost 　　　　　　|
|　　　| sample.centospub.com |
| root | sample.centospub.com　 |
+------+----------------------------+
4 rows in set (0.02 sec)

mysql> delete from mysql.user where user='';　 ← 刪除匿名用戶
Query OK, 2 rows affected (0.17 sec)

mysql> select user,host from mysql.user;　 ← 查看用戶信息
+------+----------------------------+
| user | host　　　　　　　　 |
+------+----------------------------+
| root | localhost　　　　　　|
| root | sample.centospub.com |
+------+----------------------------+
2 rows in set (0.00 sec)

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

mysql> grant all privileges on test.* to centospub@localhost identified by '在這里定義密碼';　 ← 建立對(duì)test數(shù)據(jù)庫有完全操作權(quán)限的名為centospub的用戶
Query OK, 0 rows affected (0.03 sec)

mysql> select user from mysql.user where user='centospub';　 ← 確認(rèn)centospub用戶的存在與否
+---------+
| user 　|
+---------+
| centospub |　 ← 確認(rèn)centospub已經(jīng)被建立
+---------+
1 row in set (0.01 sec)

mysql> exit　 ← 退出MySQL服務(wù)器
Bye

[root@sample ~]# mysql -u centospub -p　 ← 用新建立的centospub用戶登錄MySQL服務(wù)器
Enter password:　 ← 在這里輸入密碼

Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 10 to server version: 4.1.20

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

mysql> create database test;　 ← 建立名為test的數(shù)據(jù)庫
Query OK, 1 row affected (0.00 sec)

mysql> show databases;　 ← 查看系統(tǒng)已存在的數(shù)據(jù)庫
+-------------+
| Database |
+-------------+
| test 　　　|
+-------------+
1 row in set (0.00 sec)

mysql> use test　 ← 連接到數(shù)據(jù)庫
Database changed

mysql> create table test(num int, name varchar(50));　 ← 在數(shù)據(jù)庫中建立表
Query OK, 0 rows affected (0.03 sec)

mysql> show tables;　 ← 查看數(shù)據(jù)庫中已存在的表
+-------------------+
| Tables_in_test |
+-------------------+
| test　　　　　|
+-------------------+
1 row in set (0.01 sec)

mysql> insert into test values(1,'Hello World!');　 ← 插入一個(gè)值到表中
Query OK, 1 row affected (0.02 sec)

mysql> select * from test;　 ← 查看數(shù)據(jù)庫中的表的信息
+------+-------------------+
| num | name 　　　　　|
+------+-------------------+
| 1 　　| Hello World! 　|
+------+-------------------+
1 row in set (0.00 sec)

mysql> update test set name='Hello Everyone!';　 ← 更新表的信息，賦予新的值
Query OK, 1 row affected (0.00 sec)
Rows matched: 1 Changed: 1 Warnings: 0

mysql> select * from test;　 ← 查看數(shù)據(jù)庫中的表的信息
+------+----------------------+
| num | name　　　　　 |
+------+----------------------+
| 1 　　| Hello Everyone! |　 ← 確認(rèn)被更新到新的值
+------+----------------------+
1 row in set (0.01 sec)

mysql> delete from test where num=1;　 ← 刪除表內(nèi)的值
Query OK, 1 row affected (0.00 sec)

mysql> select * from test;　 ← 確認(rèn)刪除結(jié)果
Empty set (0.01 sec)

mysql> drop table test;　 ← 刪除表
Query OK, 0 rows affected (0.01 sec)

mysql> show tables;　 ← 查看表信息
Empty set (0.00 sec)　 ← 確認(rèn)表已被刪除

mysql> drop database test;　 ← 刪除名為test的數(shù)據(jù)庫
Query OK, 0 rows affected (0.01 sec)

mysql> show databases;　 ← 查看已存在的數(shù)據(jù)庫
Empty set (0.01 sec)　 ← 確認(rèn)test數(shù)據(jù)庫已被刪除（這里非root用戶的關(guān)系，看不到名為mysql的數(shù)據(jù)庫）

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

mysql> revoke all privileges on *.* from centospub@localhost;　 ← 取消centospub用戶對(duì)數(shù)據(jù)庫的操作權(quán)限
Query OK, 0 rows affected (0.00 sec)

mysql> delete from mysql.user where user='centospub' and host='localhost';　 ← 刪除centospub用戶
Query OK, 1 row affected (0.01 sec)

mysql> select user from mysql.user where user='centospub';　 ← 查找用戶centospub，確認(rèn)已刪除與否
Empty set (0.01 sec)　 ← 確認(rèn)centospub用戶已不存在

mysql> flush privileges;　 ← 刷新，使以上操作生效
Query OK, 0 rows affected (0.01 sec)