centos6.5 yum安装MySQL5.6
1.创建MySQL用户
#useradd mysql
#passwd mysql
#chmod u+w /etc/sudoers
#vi /etc/sudoers
mysql ALL=(ALL) ALL
2.安装仓库
要使用yum 安装mysql，要使用mysql的yum仓库，先从官网下载适合你系统的仓库
http://dev.mysql.com/downloads/repo/yum/
然后安装一下这个仓库列表
wget http://repo.mysql.com//mysql57-community-release-el6-8.noarch.rpm
rpm -ivh mysql-community-release-el6-5.noarch.rpm
或：
# yum install http://repo.mysql.com//mysql57-community-release-el6-8.noarch.rpm
3.选择版本
查看可安装的mysql版本
yum repolist enabled | grep "mysql.*-community.*"
#出现下面内容
mysql-connectors-community MySQL Connectors Community 21
mysql-tools-community MySQL Tools Community 35
mysql57-community MySQL 5.7 Community Server 82
如果我们要选择版本，可以先执行下面这个命令查看一下有哪些版本
yum repolist all | grep mysql
选择版本，启用5.6版本的，禁用5.7版本子仓库
yum-config-manager --enable mysql56-community
yum-config-manager --disable mysql57-community
或者
编辑/etc/yum.repos.d/mysql-community.repo文件
enabled=0 表示禁用
比如要安装5.7版本的mysql，要确定5.6的enabled=0，5.7的enabled=1，一次保证只启用一个子仓库
查看可安装的mysql版本
yum repolist enabled | grep "mysql.*-community.*"
#出现如下内容
mysql-connectors-community MySQL Connectors Community 21
mysql-tools-community MySQL Tools Community 35
mysql56-community MySQL 5.6 Community Server 248
4.安装
yum install mysql-community-server
5.启动数据库
[root@mysql-1 mysql]# service mysqld start
6.安全配置
[root@mysql-1 mysql]# /usr/bin/mysql_secure_installation
NOTE: RUNNING ALL PARTS OF THIS SCRIPT IS RECOMMENDED FOR ALL MySQL
SERVERS IN PRODUCTION USE! PLEASE READ EACH STEP CAREFULLY!
In order to log into MySQL to secure it, we'll need the current
password for the root user. If you've just installed MySQL, and
you haven't set the root password yet, the password will be blank,
so you should just press enter here.
Enter current password for root (enter for none): ----输入root密码（默认为空）：
OK, successfully used password, moving on...
Setting the root password ensures that nobody can log into the MySQL
root user without the proper authorisation.
Set root password? [Y/n] y ----是否要修改root密码：
New password:
Re-enter new password:
Password updated successfully!
Reloading privilege tables..
... Success!
By default, a MySQL installation has an anonymous user, allowing anyone
to log into MySQL without having to have a user account created for
them. This is intended only for testing, and to make the installation
go a bit smoother. You should remove them before moving into a
production environment.
Remove anonymous users? [Y/n] y
... Success!
Normally, root should only be allowed to connect from 'localhost'. This
ensures that someone cannot guess at the root password from the network.
Disallow root login remotely? [Y/n] y
... Success!
By default, MySQL comes with a database named 'test' that anyone can
access. This is also intended only for testing, and should be removed
before moving into a production environment.
Remove test database and access to it? [Y/n] n
... skipping.
Reloading the privilege tables will ensure that all changes made so far
will take effect immediately.
Reload privilege tables now? [Y/n] y
... Success!
All done! If you've completed all of the above steps, your MySQL
installation should now be secure.
Thanks for using MySQL!
Cleaning up...
[root@mysql-1 mysql]# service mysqld status
mysqld (pid 3097) 正在运行...
7.开启远程访问
修改/etc/mysql/my.cnf文件，将 bind-address = 127.0.0.1这一行注释掉
添加 lower_case_table_names=1忽略大小写
进入mysql服务，如果没有启动，需要先启动mysql服务
mysql -u 用户名 -p
提示输入密码，输入后进去mysql服务，执行下面语句进行授权
grant all on *.* to root@'%' identified by '你的密码' with grant option;
flush privileges;
退出mysql服务，重启mysql服务就OK啦
