启动mariadb命令（） A: systemctlstartmariadb.service B: /mariadb C: cd/home/dfitc/、./mariadbstart D: cd/etc/、./mariadbstart
启动mariadb命令（） A: systemctlstartmariadb.service B: /mariadb C: cd/home/dfitc/、./mariadbstart D: cd/etc/、./mariadbstart
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