yum remove mysql mysql-server mysql-libs compat-mysql51
rm -rf /var/lib/mysql
rm /etc/my.cnf
查看是否还有mysql软件：
rpm -qa|grep mysql
有的话继续删除
RPM方式安装MySQL5.6
a. 检查MySQL及相关RPM包，是否安装，如果有安装，则移除(rpm –e 名称)
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[root@localhost ~]# rpm -qa | grep -i mysql
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mysql-libs-5.1.66-2.el6_3.x86_64
3
[root@localhost ~]# yum -y remove mysql-libs*
b. 下载Linux对应的RPM包，如：CentOS6.4_64对应的RPM包，如下：
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[root@localhost rpm]# ll
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total 74364
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-rw-r--r--. 1 root root 18442536 Dec 11 20:19 MySQL-client-5.6.15-1.el6.x86_64.rpm
4
-rw-r--r--. 1 root root 3340660 Dec 11 20:06 MySQL-devel-5.6.15-1.el6.x86_64.rpm
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-rw-r--r--. 1 root root 54360600 Dec 11 20:03 MySQL-server-5.6.15-1.el6.x86_64.rpm
c. 安装MySQL
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[root@localhost rpm]# rpm -ivh MySQL-server-5.6.15-1.el6.x86_64.rpm
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[root@localhost rpm]# rpm -ivh MySQL-devel-5.6.15-1.el6.x86_64.rpm
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[root@localhost rpm]# rpm -ivh MySQL-client-5.6.15-1.el6.x86_64.rpm
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#修改配置文件位置
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[root@localhost rpm]# cp /usr/share/mysql/my-default.cnf /etc/my.cnf
d. 初始化MySQL及设置密码
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[root@localhost rpm]# /usr/bin/mysql_install_db
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[root@localhost rpm]# service mysql start
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[root@localhost rpm]# cat /root/.mysql_secret #查看root账号密码
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# The random password set for the root user at Wed Dec 11 23:32:50 2013 (local time): qKTaFZnl
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[root@localhost ~]# mysql -uroot –pqKTaFZnl
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mysql> SET PASSWORD = PASSWORD('123456');#设置密码为123456
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mysql>exit
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[root@localhost ~]# mysql -uroot -p123456
e. 允许远程登陆
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mysql> use mysql;
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mysql>select host,user,password from user;
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+-----------------------+------+-------------------------------------------+
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| host | user | password |
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+-----------------------+------+-------------------------------------------+
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| localhost | root | *6BB4837EB74329105EE4568DDA7DC67ED2CA2AD9 |
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| localhost.localdomain | root | *1237E2CE819C427B0D8174456DD83C47480D37E8 |
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| 127.0.0.1 | root | *1237E2CE819C427B0D8174456DD83C47480D37E8 |
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| ::1 | root | *1237E2CE819C427B0D8174456DD83C47480D37E8 |
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+-----------------------+------+-------------------------------------------+
11
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mysql> update userset password=password('123456') where user='root';
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mysql> update userset host='%' where user='root' and host='localhost';
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mysql> flush privileges;
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mysql>exit
f. 设置开机自启动
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[root@localhost ~]# chkconfig mysql on
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[root@localhost ~]# chkconfig --list | grep mysql
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mysql 0:off 1:off 2:on 3:on 4:on 5:on 6:off
g. MySQL的默认安装位置
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/var/lib/mysql/#数据库目录
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/usr/share/mysql#配置文件目录
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/usr/bin#相关命令目录
4
/etc/init.d/mysql#启动脚本
修改字符集和数据存储路径
配置/etc/my.cnf文件,修改数据存放路径、mysql.sock路径以及默认编码utf-8.
[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
#(注意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
查看字符集
show variables like '%collation%';
show variables like '%char%';
)
)
