rpm -qa | grep -i mysql

#如果安装了先卸载旧的版本

yum -y remove mysql...

b.下载需要的安装包，下载地址：

http://cdn.mysql.com/Downloads/MySQL-5.6/MySQL-client-5.6.20-1.el6.x86_64.rpm

http://cdn.mysql.com/Downloads/MySQL-5.6/MySQL-devel-5.6.20-1.el6.x86_64.rpm

http://cdn.mysql.com/Downloads/MySQL-5.6/MySQL-server-5.6.20-1.el6.x86_64.rpm

c、开始逐个安装

rpm -ivh MySQL-server-5.6.20-1.el6.x86_64.rpm

rpm -ivh MySQL-devel-5.6.20-1.el6.x86_64.rpm

rpm -ivh MySQL-client-5.6.20-1.el6.x86_64.rpm

d.修改配置文件位置并做相关设置

cp /usr/share/mysql/my-default.cnf /etc/my.cnf

vi /etc/my.cnf

#做如下配置

[client]

password = 123456

port = 3306

default-character-set=utf8

[mysqld]

port = 3306

character_set_server=utf8

character_set_client=utf8

collation-server=utf8_general_ci

#linux下mysql安装完后是默认：表名区分大小写，列名不区分大小写； 0：区分大小写，1：不区分大小写

lower_case_table_names=1

#设置最大连接数，默认为 151，MySQL服务器允许的最大连接数16384

max_connections=1000

[mysql]

default-character-set = utf8

e.初始化MySQL及设置密码

/usr/bin/mysql_install_db

service mysql start

f.登录到mysql,第一次装没有密码，直接回车

mysql -uroot -p

#设置root用户的密码

mysql> update user set password=password('123456') where user='root';

g.设置允许远程登录

mysql> use mysql;

mysql> select host,user,password from user;

mysql> update user set host='%' where user='root' and host='localhost';

mysql> flush privileges;

mysql> exit;

h.设置开机自启动

chkconfig mysql on

chkconfig --list | grep mysql

i. MySQL的默认安装位置说明

/var/lib/mysql/ #数据库目录

/usr/share/mysql #配置文件目录

/usr/bin #相关命令目录

/etc/init.d/mysql #启动脚本 注：卸载mysql的时候，将这些目录下的文件也删掉。

j.可能遇到的错误(一)

2014-01-21 06:03:29 14964 [ERROR] InnoDB: auto-extending data file ./ibdata1 is of a different size 640 pages (rounded down to MB) than specified in the .cnf file: initial 768 pages, max 0 (relevant if non-zero) pages!

2014-01-21 06:03:29 14964 [ERROR] InnoDB: Could not open or create the system tablespace. If you tried to add new data files to the system tablespace, and it failed here, you should now edit innodb_data_file_path in my.cnf back to what it was, and remove the new ibdata files InnoDB created in this failed attempt. InnoDB only wrote those files full of zeros, but did not yet use them in any way. But be careful: do not remove old data files which contain your precious data!

2014-01-21 06:03:29 14964 [ERROR] Plugin 'InnoDB' init function returned error.

2014-01-21 06:03:29 14964 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed.

2014-01-21 06:03:29 14964 [ERROR] Unknown/unsupported storage engine: InnoDB

2014-01-21 06:03:29 14964 [ERROR] Aborting

在/var/lib/mysql/目录下删掉这三个文件：ibdata1 ib_logfile0 ib_logfile1 然后重启mysql

cd /var/lib/mysql

rm ibdata1 ib_logfile0 ib_logfile1

service mysql start

k.可能遇到的错误(二)

[root@localhost local]# mysql -uroot -p

Enter password:

ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: YES)

方法操作很简单，如下：

# /etc/init.d/mysql stop

# mysqld_safe --user=mysql --skip-grant-tables --skip-networking &

# mysql -u root mysql

//把空的用户密码都修改成非空的密码。

mysql> UPDATE user SET Password=PASSWORD('newpassword') where USER='root' and host='root' or host='localhost';

mysql> FLUSH PRIVILEGES;

mysql> quit # /etc/init.d/mysqld restart

# mysql -uroot -p

Enter password:

l.可能遇到的错误(三)

mysql> show databases;

ERROR 1820 (HY000): You must SET PASSWORD before executing this statement

这句话要求你重新设置一次密码！

mysql>  SET PASSWORD = PASSWORD('123456');

Query OK, 0 rows affected (0.03 sec)

mysql> create database roger;

Query OK, 1 row affected (0.00 sec)

参考：http://blog.csdn.net/liumm0000/article/details/18841197