CentOS7下MariaDB和phpMyAdmin安装配置问题解决
首先说一下，在CentOS7下，用yum安装的mysql都变成了mariaDB，最开始我还怕phpmyadmin不支持maria，后来网上一查是支持的。
首先说一下，在CentOS7下，用yum安装的mysql都变成了mariaDB，最开始我还怕phpmyadmin不支持maria，后来网上一查是支持的。
那么话不多说，首先是安装php、apache服务器（httpd）和phpmyadmin，因为这个比较简单嘛。
那么在我现在这个时间点，yum安装出的php版本是5.4的。这个可以安装以后通过rpm -qa|grep php查看。
而在我这个时间点，最新版本的phpmyadmin需要php5.5+的版本，于是乎，要下载一个稍微旧一点的版本。这个在官网上都有。
httpd安装以后，配置文件是/etc/httpd/conf/httpd.conf，而根目录并不是网上说的/var/www/而是/var/www/html/，所以把下载好并且解压过的phpmyadmin文件夹放于此处，然后改个方便的名字便于访问。我在此将文件夹名字改成phpmyadmin。然后执行service httpd start。好你是不是以为可以访问phpmyadmin了？
当然不能访问，会提示你403forbidden，这个时候，要去刚刚说的配置文件里修改，将你看到的
AllowOverride none
Require all denied
改为
AllowOverride none
Order allow,deny
Allow from all
然后保存退出，重启service httpd restart。浏览器里再打开localhost/phpmyadmin，如果你发现有selinux干扰你，你就执行sentenforce 0就好了。
当然也有可能提示你缺少mbstring。这个只需要yum install php-mbstring就好了。
那么再来说说mariaDB，首先通过yum install mysql，自动装上mariaDB而不是mysql。
装好以后，尝试service mariadb start好像不管用，其实在centOS7下命令应该是systemctl start mariadb.service。那么你发现其实还是开启不起来？
好吧你应该检查下你的mariaDB有没有装齐全，rpm -qa|grep mariadb看一下。我当时居然只装了可怜的两个包，事实上需要装8个包：
mariadb-libs-5.5.44-1.el7_1.x86_64
mariadb-embedded-5.5.44-1.el7_1.x86_64
mariadb-5.5.44-1.el7_1.x86_64
mariadb-bench-5.5.44-1.el7_1.x86_64
mariadb-embedded-devel-5.5.44-1.el7_1.x86_64
mariadb-devel-5.5.44-1.el7_1.x86_64
mariadb-test-5.5.44-1.el7_1.x86_64
mariadb-server-5.5.44-1.el7_1.x86_64
版本号随你装的版本而改变。如果你发现没装的，你就挨个yum install吧。。。（其实我个人觉得test是不是可以不装，但是完整的数据库好像都有test）
装好啦，再次systemctl start mariadb.service，你会发现为什么还是不行！
其实是没有指定数据库的存放位置和名字啦，执行命令：mysql_install_db --datadir="/var/lib/mysql" --user="mysql"
指定以后好像终于可以了。但是在第一次时候别忘了给你的root定个密码：mysqladmin -u root password '1234'
这下子是真的大功告成了。可以用刚设置的root和密码登陆phpmyadmin了。彻底完成。
查看mariadb运行状态可以用systemctl status mariadb.service
结果如下：
Linux系统教程：如何检查MariaDB服务端版本
MariaDB Proxy读写分离的实现
Linux下编译安装配置MariaDB数据库的方法
CentOS系统使用yum安装MariaDB数据库
安装MariaDB与MySQL并存
Ubuntu 上如何将 MySQL 5.5 数据库迁移到 MariaDB 10
[翻译]Ubuntu 14.04 (Trusty) Server 安装 MariaDB
MariaDB 的详细介绍：请点这里
MariaDB 的下载地址：请点这里
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