MySQL在centos6下的yum安装使用
环境：centos6.7 32bit
数据库MySQL的安装配置
1.安装
[root@cloudstack Desktop]# yum -y install mysql-server Loaded plugins: fastestmirror, refresh-packagekit, security ....... Dependency Installed: mysql.i686 0:5.1.73-5.el6_6 perl-DBD-MySQL.i686 0:4.013-3.el6 perl-DBI.i686 0:1.609-4.el6 Complete!
[root@cloudstack Desktop]# yum -y install php-mysql Loaded plugins: fastestmirror, refresh-packagekit, security Setting up Install Process ...... Installed: php-mysql.i686 0:5.3.3-46.el6_6 Dependency Installed: php-common.i686 0:5.3.3-46.el6_6 php-pdo.i686 0:5.3.3-46.el6_6 Complete!
2.启动
[root@cloudstack Desktop]# /etc/rc.d/init.d/mysqld start Initializing MySQL database: Installing MySQL system tables... OK Filling help tables... OK To start mysqld at boot time you have to copy support-files/mysql.server to the right place for your system PLEASE REMEMBER TO SET A PASSWORD FOR THE MySQL root USER ! To do so, start the server, then issue the following commands: /usr/bin/mysqladmin -u root password 'new-password' /usr/bin/mysqladmin -u root -h cloudstack.lyy.com password 'new-password' Alternatively you can run: /usr/bin/mysql_secure_installation which will also give you the option of removing the test databases and anonymous user created by default. This is strongly recommended for production servers. See the manual for more instructions. You can start the MySQL daemon with: cd /usr ; /usr/bin/mysqld_safe & You can test the MySQL daemon with mysql-test-run.pl cd /usr/mysql-test ; perl mysql-test-run.pl Please report any problems with the /usr/bin/mysqlbug script! [ OK ] Starting mysqld: [ OK ]
3.通过root用户（此时并没有密码）登陆
[root@cloudstack Desktop]# mysql -u root Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 2 Server version: 5.1.73 Source distribution Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved. Oracle is a registered trademark of Oracle Corporation and/or its affiliates. Other names may be trademarks of their respective owners. Type 'help;' or '\h' for help. Type '\c' to clear the current input statement. mysql>
查看当前root用户没有密码：
mysql> select user, host, password from mysql.user; +------+--------------------+----------+ | user | host | password | +------+--------------------+----------+ | root | localhost | | | root | cloudstack.lyy.com | | | root | 127.0.0.1 | | | | localhost | | | | cloudstack.lyy.com | | +------+--------------------+----------+ 5 rows in set (0.00 sec)
设置root用户的密码为操作系统的密码：
mysql> set password for root@localhost=password('centos6');
Query OK, 0 rows affected (0.00 sec)
mysql> set password for [email protected]=password('centos6');
Query OK, 0 rows affected (0.00 sec)
mysql> select user, host, password from mysql.user;
+------+--------------------+-------------------------------------------+
| user | host | password |
+------+--------------------+-------------------------------------------+
| root | localhost | *D53AD928B433F60B05A0B29CA1BCEA6809AC1B9D |
| root | cloudstack.lyy.com | *D53AD928B433F60B05A0B29CA1BCEA6809AC1B9D |
| root | 127.0.0.1 | |
| | localhost | |
| | cloudstack.lyy.com | |
+------+--------------------+-------------------------------------------+
5 rows in set (0.00 sec)
mysql> exit
Bye
退出mysql，并重新使用root用户登录，验证修改后的密码。
[root@cloudstack Desktop]# mysql -u root ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: NO) [root@cloudstack Desktop]# mysql -u root -p Enter password: Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 5 Server version: 5.1.73 Source distribution Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved. Oracle is a registered trademark of Oracle Corporation and/or its affiliates. Other names may be trademarks of their respective owners. Type 'help;' or '\h' for help. Type '\c' to clear the current input statement. mysql> exit Bye