6步在CentOS安装和配置MariaDB MySQL

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# systemctl status mariadb　　
? mariadb.service - MariaDB database server
　　
   Loaded: loaded (/usr/lib/systemd/system/mariadb.service; disabled; vendor preset: disabled)
　　
   Active: active (running) since Thu 2017-06-26 18:26:35 UTC; 13s ago
　　
  Process: 4049 ExecStartPost=/usr/libexec/mariadb-wait-ready $MAINPID (code=exited, status=0/SUCCESS)
　　
  Process: 3969 ExecStartPre=/usr/libexec/mariadb-prepare-db-dir %n (code=exited, status=0/SUCCESS)
　　
Main PID: 4048 (mysqld_safe)
　　
   CGroup: /system.slice/mariadb.service
　　
           +-4048 /bin/sh /usr/bin/mysqld_safe --basedir=/usr
　　
           +-4206 /usr/libexec/mysqld --basedir=/usr --datadir=/var/lib/mysql --plugin-dir=/usr/lib64/mysql/plugin --log-error=/var/log/mariadb/ma...
　　

　　
Aug 15 15:20:30 deploy mariadb-prepare-db-dir[3969]: The latest information about MariaDB is available at http://mariadb.org/.
　　
Aug 15 15:20:30 deploy mariadb-prepare-db-dir[3969]: You can find additional information about the MySQL part at:
　　
Aug 15 15:20:30 deploy mariadb-prepare-db-dir[3969]: http://dev.mysql.com
　　
Aug 15 15:20:30 deploy mariadb-prepare-db-dir[3969]: Support MariaDB development by buying support/new features from MariaDB
　　
Aug 15 15:20:30 deploy mariadb-prepare-db-dir[3969]: Corporation Ab. You can contact us about this at sales@mariadb.com.
　　
Aug 15 15:20:30 deploy mariadb-prepare-db-dir[3969]: Alternatively consider joining our community based development effort:
　　
Aug 15 15:20:30 deploy mariadb-prepare-db-dir[3969]: http://mariadb.com/kb/en/contributing-to-the-mariadb-project/
　　
Aug 15 15:20:30 deploy mysqld_safe[4048]: 170601 15:20:33 mysqld_safe Logging to '/var/log/mariadb/mariadb.log'.
　　
Aug 15 15:20:30 deploy mysqld_safe[4048]: 170601 15:20:33 mysqld_safe Starting mysqld daemon with databases from /var/lib/mysql
　　
Aug 15 15:20:35 deploy systemd[1]: Started MariaDB database server.