当我在 ubuntu 18.04 中检查mysql状态时，mysql 处于非活动状态。mysql 代码的错误是：
root@fair-VirtualBox:~# systemctl status mysql
● mysql.service
Loaded: masked (/dev/null; bad)
Active: inactive (dead)
मार्च 11 14:13:00 fair-VirtualBox systemd[1]: /etc/systemd/system/mysql.service.d/override.conf:1: Assignment outside of section. Ignoring.
मार्च 11 14:13:34 fair-VirtualBox systemd[1]: /etc/systemd/system/mysql.service.d/override.conf:1: Assignment outside of section. Ignoring.
मार्च 11 14:13:34 fair-VirtualBox systemd[1]: /etc/systemd/system/mysql.service.d/override.conf:1: Assignment outside of section. Ignoring.
मार्च 11 14:13:34 fair-VirtualBox systemd[1]: /etc/systemd/system/mysql.service.d/override.conf:1: Assignment outside of section. Ignoring.
मार्च 11 14:13:34 fair-VirtualBox systemd[1]: /etc/systemd/system/mysql.service.d/override.conf:1: Assignment outside of section. Ignoring.
मार्च 11 14:17:20 fair-VirtualBox systemd[1]: /etc/systemd/system/mysql.service.d/override.conf:1: Assignment outside of section. Ignoring.
मार्च 11 14:17:20 fair-VirtualBox systemd[1]: /etc/systemd/system/mysql.service.d/override.conf:1: Assignment outside of section. Ignoring.