今天安裝了mariadb，在啟動時報錯如下:

[[email protected] bin]# mysqld_safe
160608 09:18:25 mysqld_safe Logging to '/var/log/mariadb/mariadb.log'.
160608 09:18:25 mysqld_safe Starting mysqld daemon with databases from /var/lib/mysql
160608 09:18:26 mysqld_safe mysqld from pid file /var/run/mariadb/mariadb.pid ended

然後去分析報錯檔案，看到如下內容:

160608  9:18:26 [ERROR] Can't open the mysql.plugin table. Please run mysql_upgrade to create it.
160608  9:18:26 [Note] Server socket created on IP: '0.0.0.0'.
160608  9:18:26 [ERROR] Fatal error: Can't open and lock privilege tables: Table 'mysql.host' doesn't exist
160608 09:18:26 mysqld_safe mysqld from pid file /var/run/mariadb/mariadb.pid ended

因為這裡它報錯mysql.host不存在，而且無法開啟mysql.plugin表，說明此時的問題是沒有安裝初始的資料庫，因此執行如下命令即可:

mysql_install_db --user=mysql --datadir=/usr/local/mysql/var

這裡的datadir換成我們的資料儲存目錄即可。

然後再次啟動就可以了。