安装mysql

yum -y install mysql

yum -y install mysql-server

yum -y install php-mysql

yum -y install mysql-devel

2.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

3.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

4.修改密码

[root@sampl ~]# mysql -uroot  root默认无密码

mysql> select user,host,password from mysql.user;

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

| user | host                  | password |

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

| root | localhost             |          |

| root | ay140611163431555064z |          |

| root | 127.0.0.1             |          |

|      | localhost             |          |

|      | ay140611163431555064z |          |

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

下面是把密码都设置成123456

mysql> set password for root@localhost=password('123456');

Query OK, 0 rows affected (0.00 sec)

mysql> set password for root@127.0.0.1=password('123456');

Query OK, 0 rows affected (0.00 sec)

mysql> set password for root@ay140611163431555064z=password('123456');

Query OK, 0 rows affected (0.00 sec)

删除匿名账号

mysql> delete from mysql.user where user='';

mysql> select user,host,password from mysql.user;

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

| user | host                  | password                                  |

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

| root | localhost             | *047871A860B9795D35702CA5974FA67374791CAD |

| root | ay140611163431555064z | *047871A860B9795D35702CA5974FA67374791CAD |

| root | 127.0.0.1             | *047871A860B9795D35702CA5974FA67374791CAD |

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

3 rows in set (0.00 sec)

mysql> quit

设置完成

补充：设置或修改用户密码的另一种方法

把root的密码设为123456，如果root已经有密码，命令运行时会让输入原密码

[root@sample ~]# mysqladmin -uroot -p password 123456

注意！！！

安装完后，查看max_allowed_packet配置值

show VARIABLES like '%max_allowed_packet%';

如果写1024会有问题，需要改大些

在my.cnf的[mysqld]下添加

max_allowed_packet = 20M

如果遇到远程连接数据库，得到报错信息" Lost connection to MySQL server at 'reading initial communication packet', system error: 104",那么在my.cnf的[myslqd]里增加一行：

skip-name-resolve

本文转自   zl1030   51CTO博客，原文链接:http://blog.51cto.com/zl1030/1425089