http://database.51cto.com/art/201310/413006.htm
MariaDB和MySQL
--mysql-5.7.12-1.el7.x86_64.rpm-bundle.tar
]# ls
mysql-community-client-5.7.12-1.el7.x86_64.rpm
mysql-community-common-5.7.12-1.el7.x86_64.rpm
mysql-community-devel-5.7.12-1.el7.x86_64.rpm
mysql-community-libs-5.7.12-1.el7.x86_64.rpm
mysql-community-server-5.7.12-1.el7.x86_64.rpm
一般把以上安装就可用
清理冲突：MariaDB和MySQL 只能安装一个，相互间有冲突，
rpm -qa |grep mariadb
rpm -e --allmatches mariadb-server --nodeps
How to start/stop/restart MySQL Server
Now MySQL Server is installed on your system.
To start MySQL Service, run command
systemctl start mysqld
To stop MySQL Service, run command
systemctl stop mysqld
To restart MySQL Service, run command
systemctl restart mysqld
To get status of MySQL Service, run command
systemctl status mysqld
Reset MySQL root password
默认密码在这：cat /var/log/mysqld.log | grep localhost
mysql -uroot -p
set password='book_@BOOK%4321';
grant all privileges on *.* to 'root'@'%' identified by 'book_@BOOK%4321';
grant all privileges on *.* to 'ucr_param'@'%' identified by 'Abc%4321';
flush privileges;