[root@localhost data]# service mysql start Redirecting to /bin/systemctl start mysql.service Job for mysqld.service failed because the control process exited with error code. See "systemctl status mysqld.service" and "journalctl -xe" for details. [root@localhost data]# systemctl status mysqld.service ● mysqld.service - LSB: start and stop MySQL Loaded: loaded (/etc/rc.d/init.d/mysqld; bad; vendor preset: disabled) Active: failed (Result: exit-code) since Tue 2019-01-08 18:12:43 CST; 8s ago Docs: man:systemd-sysv-generator(8) Process: 11815 ExecStop=/etc/rc.d/init.d/mysqld stop (code=exited, status=0/SUCCESS) Process: 13300 ExecStart=/etc/rc.d/init.d/mysqld start (code=exited, status=1/FAILURE)
Jan 08 18:12:40 localhost.localdomain systemd[1]: Starting LSB: start and stop MySQL... Jan 08 18:12:43 localhost.localdomain mysqld[13300]: Starting MySQL... ERROR! The server quit without updating PID file (/www/server/data/localhost.localdomain.pid). Jan 08 18:12:43 localhost.localdomain systemd[1]: mysqld.service: control process exited, code=exited status=1 Jan 08 18:12:43 localhost.localdomain systemd[1]: Failed to start LSB: start and stop MySQL. Jan 08 18:12:43 localhost.localdomain systemd[1]: Unit mysqld.service entered failed state. Jan 08 18:12:43 localhost.localdomain systemd[1]: mysqld.service failed. 这时候先检查一下你的ibdata文件所属的用户和用户组是否正确，有可能是权限问题导致。
