一、MariaDB介绍
新版本的REDHAT内核Linux，如Fedora 21,Centos7中，都通过安装MariaDB来使用MySQL.
MariaDB是mysql的一个分支，MariaDB由MySQL的创始人Michael Widenius（英语：Michael Widenius）主导开发，MariaDB名称来自Michael Widenius的女儿Maria的名字。Michael Widenius在意识到Oracle会对MySQL许可做什么后将MariaDB分离了出来。
下图是一张MariaDB与Mysql的性能比较。
二、安装Mariadb
在centos7的软件库中搜索mariadb，你会发现如下相关软件包，一般
[root@ctl-net ~]# yum search MariaDB 已加载插件：fastestmirror, langpacks Loading mirror speeds from cached hostfile * base: mirror.neu.edu.cn * epel: mirror01.idc.hinet.net * extras: mirror.neu.edu.cn * updates: mirror.neu.edu.cn ===================================================== N/S matched: MariaDB ===================================================== mariadb-bench.x86_64 : MariaDB benchmark scripts and data mariadb-devel.i686 : Files for development of MariaDB/MySQL applications mariadb-devel.x86_64 : Files for development of MariaDB/MySQL applications mariadb-embedded.i686 : MariaDB as an embeddable library mariadb-embedded.x86_64 : MariaDB as an embeddable library mariadb-embedded-devel.i686 : Development files for MariaDB as an embeddable library mariadb-embedded-devel.x86_64 : Development files for MariaDB as an embeddable library mariadb-libs.i686 : The shared libraries required for MariaDB/MySQL clients mariadb-libs.x86_64 : The shared libraries required for MariaDB/MySQL clients mariadb-server.x86_64 : The MariaDB server and related files mariadb.x86_64 : A community developed branch of MySQL mariadb-test.x86_64 : The test suite distributed with MariaD
在这里我们只需安装客户端mariadb.x86_64与服务器端mariadb-server.x86_64，执行 如下命令
yum install -y mariadb.x86_64 mariadb-server.x86_64
安装了mariadb.x86_64，mariadb-server.x86_64后，执行如下命令启动数据库服务
systemctl start mariadb.service
设置开机启动
systemctl enable mariadb.service
然后设置root密码
mysqladmin -u root password 'newpassword'
设置了密码后，就可以使用如下命令登陆数据库了
mysql -uroot -p newpassword
三、备注
安装mariadb.x86_64其实安装了如下等命令：
mysql mysqladmin mysqlcheck mysql_find_rows mysqlshow mysql_waitpid mysqlaccess mysqlbinlog mysqldump mysqlimport mysqlslap
安装mariadb-server.x86_64后，有如下等命令
mysql mysqld_multi mysqlimport mysqltest mysqlaccess mysqld_safe mysql_install_db mysql_tzinfo_to_sql mysqladmin mysqldump mysql_plugin mysql_upgrade mysqlbinlog mysqldumpslow mysql_secure_installation mysql_waitpid mysqlbug mysql_find_rows mysql_setpermission mysql_zap mysqlcheck mysql_fix_extensions mysqlshow mysql_convert_table_format mysqlhotcopy mysqlslap
