目录
卸载MySQL
由于CentOS 6版本是自带MySQL的所以我们需要卸载之后再进行安装；
1，先使用rpm -qa | grep mysql命令检测Linux系统是否已经安装了MySQL，如果安装会有如下提示
2，很显然我安装的CentOS6系统已经安装了，故使用rpm -e --nodeps mysql-libs-5.1.73-5.el6_6.i686命令将其卸载掉。
3，怎样证明你确实卸载掉了呢？仍然可使用rpm -qa | grep mysql命令来查看；
yum方式安装
1，安装及配置
# wget http://repo.mysql.com/mysql-community-release-el6-5.noarch.rpm
# rpm -ivh mysql-community-release-el6-5.noarch.rpm
# yum repolist all | grep mysql安装成功后在/etc/yum.repos.d/下会多出几个mysql的yum源的配置
2,下面安装MYSQL数据库，这个过程比较久
# yum install mysql-community-server -y3，设置为开机启动(2、3、4都是on代表开机自动启动)
# chkconfig --list | grep mysqld
# chkconfig mysqld on4，设置远程root
启动mysql
# service mysqld start
设置root密码以及一些安全信息
# mysql_secure_installation安装完mysql-server 会提示可以运行mysql_secure_installation。运行mysql_secure_installation会执行几个设置：
a)为root用户设置密码
b)删除匿名账号
c)取消root用户远程登录
d)删除test库和对test库的访问权限
e)刷新授权表使修改生效
通过这几项的设置能够提高mysql库的安全。建议生产环境中mysql安装这完成后一定要运行一次mysql_secure_installation，详细步骤请参看下面的命令:
[root@server1 ~]# 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):<–初次运行直接回车
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] <– 是否设置root用户密码，输入y并回车或直接回车
New password: <– 设置root用户的密码
Re-enter new password: <– 再输入一次你设置的密码
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] <– 是否删除匿名用户,生产环境建议删除，所以直接回车
… 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] <–是否禁止root远程登录,根据自己的需求选择Y/n并回车,建议禁止
… 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] <– 是否删除test数据库,直接回车
- Dropping test database…
… Success!
- Removing privileges on test database…
… Success!
Reloading the privilege tables will ensure that all changes made so far
will take effect immediately.
Reload privilege tables now? [Y/n] <– 是否重新加载权限表，直接回车
… Success!
Cleaning up…
All done! If you've completed all of the above steps, your MySQL
installation should now be secure.
Thanks for using MySQL!
[root@server1 ~]#
登陆root账号
# mysql -uroot -p
建立远程root用户
mysql> GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY '你设置的密码' WITH GRANT OPTION;
mysql> flush privileges;5，设置utf-8编码
查看mysql原本编码：
mysql> show variables like 'character%';
# vi /etc/my.cnf[mysql]
default-character-set = utf8
[mysql.server]
default-character-set = utf8
[mysqld_safe]
default-character-set = utf8
[client]
default-character-set = utf86，重启mysql
# service mysqld restart注意：安装mysql之后root权限是不能远程链接的，需要远程链接需要自己登录mysql之后修改，如果还不能远程链接请检查防火墙是否关闭；
二进制tar包方式安装
下载mysql链接：https://dev.mysql.com/downloads/mysql/5.6.html#downloads
选择（Linux通用）以及版本信息
