Linux下MySql+PHP+apache配置

安装MySQL。

[root@sample ~]# yum -y install mysql-server ← 安装MySQL
[root@sample ~]# yum -y install php-mysql ← 安装php-mysql

配置MySQL

[root@sample ~]#vim /etc/my.cnf ← 编辑MySQL的配置文件

[mysqld]
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
# Default to using old password format for compatibility with mysql 3.x
# clients (those using the mysqlclient10 compatibility package).
old_passwords=1 ← 找到这一行，在这一行的下面添加新的规则，让MySQL的默认编码为UTF-8
default-character-set = utf8 ← 添加这一行

然后在配置文件的文尾填加如下语句：

[mysql]
default-character-set = utf8

启动MySQL服务

[root@sample ~]# chkconfig mysqld on ← 设置MySQL服务随系统启动自启动

[root@sample ~]# chkconfig --list mysqld ← 确认MySQL自启动
mysqld 0:off 1:off 2:on 3:on 4:on 5:on 6:off ← 如果2--5为on的状态就OK

[root@sample ~]#/etc/rc.d/init.d/mysqld start ← 启动MySQL服务

Initializing MySQL database: [ OK ]
Starting MySQL:    [ OK ]
MySQL初始环境设定

[1]为MySQL的root用户设置密码

MySQL在刚刚被安装的时候，它的root用户是没有被设置密码的。首先来设置MySQL的root密码。

[root@sample ~]# mysql -u root ← 用root用户登录MySQL服务器

Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 2 to server version: 4.1.20

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

mysql> select user,host,password from mysql.user; ← 查看用户信息
+------+------------------------------+---------------+
| user | host | password |
+------+------------------------------+---------------+
| root | localhost | | ← root密码为空
| root | sample.centospub.com | | ← root密码为空
| | sample.centospub.com | |
| | localhost | |
|root | %                                 |XXX  |
| |                        | |
+------+------------------------------+---------------+

4 rows in set (0.00 sec)

mysql> set password for root@localhost=password('在这里填入root密码'); ← 设置root密码
Query OK, 0 rows affected (0.01 sec)

mysql> set password for root@'sample.centospub.com'=password('在这里填入root密码'); ← 设置root密码
Query OK, 0 rows affected (0.01 sec)只有设置了这个才可以，才可以通过数据库来安装网址

mysql> set password for root@'xxx'=password('xxx'); ← 设置root密码
Query OK, 0 rows affected (0.01 sec)

mysql> select user,host,password from mysql.user; ← 查看用户信息
+------+--------------------------------+--------------------------+
| user | host | password |
+------+--------------------------------+--------------------------+
| root | localhost | 19b68057189b027f | ← root密码被设置
| root | sample.centospub.com | 19b68057189b027f | ← root密码被设置
| | sample.centospub.com | |
| | localhost | |
+------+--------------------------------+--------------------------+
4 rows in set (0.01 sec)

mysql> exit ← 退出MySQL服务器
Bye

yum install -y php
## 这个只安装PHP
## 建议安装运行库及MySQL的支持
yum install -y php php-devel php-mysql
## 如果你的系统是CentOS 5.6那么上面这条命令安装的是PHP 5.1,要安装 PHP 5.3则执行下面的命令:
yum install -y php53 php53-devel php53-mysql

/etc/init.d/httpd start

wget -q -O - http://www.atomicorp.com/installers/atomic.sh | sh

yum upgrade

 

 

 

 

卸载与重装mysql
1. service mysqld stop #停止mysql服务 
 
2. yum remove mysql #卸载mysql 
 
3. cd /var/lib  #这里有mysql的文件夹，里面放的是数据库文件 
 
4. mkdir mysqlbac   www.2cto.com 
 
5. mv mysql mysqlbac  #把没有卸载干净的文件备份，以防万一，这步一定要做，否则下面的操作完成后还有问题 
 
6. yum install mysql-server #重新安装mysql 
 
7. service mysqld start #启动mysql服务 
 
8. mysql -uroot mysql #以root身份进入mysql数据库 
 
9. update user set password = password('123456') where user='root' #将root的密码设置为123456 
 
10. flush privileges  
 
11. exit