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CentOS安装mysql(2)
Enter password: ← 在这里输入密码
Welcome to the MySQL monitor. Commands end with ; or \g. ← 确认用密码能够成功登录
Your MySQL connection id is 6 to server version: 4.1.20
Type 'help;' or '\h' for help. Type '\c' to clear the buffer.
mysql> exit ← 退出MySQL服务器
Bye
[2] 删除匿名用户
在MySQL刚刚被安装后，存在用户名、密码为空的用户。这使得数据库服务器有无需密码被登录的可能性。为消除隐患，将匿名用户删除。
[root@sample ~]# mysql -u root -p ← 通过密码用root登录
Enter password: ← 在这里输入密码
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 7 to server version: 4.1.20
Type 'help;' or '\h' for help. Type '\c' to clear the buffer.
mysql> select user,host from mysql.user; ← 查看用户信息
+------+----------------------------+
| user | host |
+------+----------------------------+
| | localhost |
| root | localhost |
| | sample.centospub.com |
| root | sample.centospub.com |
+------+----------------------------+
4 rows in set (0.02 sec)
mysql> delete from mysql.user where user=''; ← 删除匿名用户
Query OK, 2 rows affected (0.17 sec)
mysql> select user,host from mysql.user; ← 查看用户信息
+------+----------------------------+
| user | host |
+------+----------------------------+
| root | localhost |
| root | sample.centospub.com |
+------+----------------------------+
2 rows in set (0.00 sec)
mysql> exit ← 退出MySQL服务器
Bye
好了，下面都不是必须的了!
测试MySQL
[root@sample ~]# mysql -u root -p ← 通过密码用root登录
Enter password: ← 在这里输入密码
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 9 to server version: 4.1.20
Type 'help;' or '\h' for help. Type '\c' to clear the buffer.
mysql> grant all privileges on test.* to centospub@localhost identified by '在这里定义密码'; ← 建立对test数据库有完全操作权限的名为centospub的用户
Query OK, 0 rows affected (0.03 sec)
mysql> select user from mysql.user where user='centospub'; ← 确认centospub用户的存在与否
+---------+
| user |
+---------+
| centospub | ← 确认centospub已经被建立
+---------+
1 row in set (0.01 sec)
mysql> exit ← 退出MySQL服务器
Bye
[root@sample ~]# mysql -u centospub -p ← 用新建立的centospub用户登录MySQL服务器
Enter password: ← 在这里输入密码
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; ← 建立名为test的数据库
Query OK, 1 row affected (0.00 sec)
mysql> show databases; ← 查看系统已存在的数据库
+-------------+
| Database |
+-------------+
| test |
+-------------+
1 row in set (0.00 sec)
mysql> use test ← 连接到数据库
Database changed
mysql> create table test(num int, name varchar(50)); ← 在数据库中建立表
Query OK, 0 rows affected (0.03 sec)
mysql> show tables; ← 查看数据库中已存在的表
+-------------------+
| Tables_in_test |
+-------------------+
| test |
+-------------------+
1 row in set (0.01 sec)
mysql> insert into test values(1,'Hello World!'); ← 插入一个值到表中
Query OK, 1 row affected (0.02 sec)
mysql> select * from test; ← 查看数据库中的表的信息
+------+-------------------+
| 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，赋予新的值
Query OK, 1 row affected (0.00 sec)
原文转自：http://www.blogjava.net/qileilove/archive/2012/05/24/379016.html
