CentOs6.7环境下rpm包安装mysql5.7
1.移除原有的mysql包
查询：
rpm -qa|grep mysql移除：
rpm -e mysql-libs-5.1.73-5.el6_6.x86_64 --nodeps
2.安装
顺序安装如下rpm包：
rpm -i mysql-commercial-common-5.7.10-1.1.el6.x86_64.rpm
rpm -i mysql-commercial-libs-5.7.10-1.1.el6.x86_64.rpm
rpm -i mysql-commercial-client-5.7.10-1.1.el6.x86_64.rpm
rpm -i mysql-commercial-server-5.7.10-1.1.el6.x86_64.rpm
3.初始化
/usr/bin/mysqld --initialize --user=mysql
4.启动
/etc/init.d/mysqld start或者直接
service mysqld start
问题：初始化或重启中可能会出现如下问题：
2016-01-31T13:47:52.934154Z 0 [ERROR] InnoDB: Operating system error number 13 in a file operation. 2016-01-31T13:47:52.934209Z 0 [ERROR] InnoDB: The error means mysqld does not have the access right s to the directory. 2016-01-31T13:47:52.934221Z 0 [ERROR] InnoDB: os_file_get_status() failed on './ibdata1'. Can't det ermine file permissions 2016-01-31T13:47:52.934232Z 0 [ERROR] InnoDB: Plugin initialization aborted with error Generic error 2016-01-31T13:47:53.539845Z 0 [ERROR] Plugin 'InnoDB' init function returned error. 2016-01-31T13:47:53.539899Z 0 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed. 2016-01-31T13:47:53.539913Z 0 [ERROR] Failed to initialize plugins. 2016-01-31T13:47:53.539919Z 0 [ERROR] Aborting
遇到如上问题，你需要
vi /etc/selinux/config将
SELINUX=permissive
重启你的机器后就可以启动你的mysql了，别问我为什么，我也不知道（权限问题）
忘记root密码:(安全模式启动5.7同样有效)
mysqld_safe --skip-grant-tables --skip-networking &
mysql -uroot -p
重置密码：
use mysql;
update mysql.user set authentication_string=password('root') where user='root' and Host = 'localhost';
以上命令只适用于5.7版本的mysql哦!
第二次修改的时候需要这样子咯：
set password for 'root'@'localhost'=password('root');
运行远程访问：
GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY 'root' WITH GRANT OPTION;
以上每个修改步骤都要：
FLUSH PRIVILEGES;
5.开启重启
chkconfig --add mysqld chkconfig --level 2345 mysqld on
6.mysql安装文件路径
默认日志文件路径：/usr/log/mysqld.log
默认配置文件路径：/etc/my.conf
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