Job for mysqld.service failed because the control process exited with error code. See "systemctl status mysqld.service" and "journalctl -xe" for details.
之后查看状态
ysqld.service - LSB: start and stop MySQL
Loaded: loaded (/etc/init.d/mysqld; bad; vendor preset: enabled)
Active: failed (Result: exit-code) since 三 2019-06-12 10:50:55 CST; 9s ago
Docs: man:systemd-sysv-generator(8)
Process: 3376 ExecStart=/etc/init.d/mysqld start (code=exited, status=1/FAILURE)