报错信息
登陆数据库报错：`
ERROR 2002 (HY000): Can’t connect to local MySQL server through socket ‘/var/lib/mysql/mysql.sock’ (2 “No such file or directory”)`
重启服务报错：
Job for mariadb.service failed because the control process exited with error code. See "systemctl status mariadb.service" and "journalctl -xe" for details.
Job for mariadb.service failed because the control process exited with error code. See "systemctl status mariadb.service" and "journalctl -xe" for details.
查看服务状态信息：`systemctl status mariadb.service
● mariadb.service – MariaDB 10.1 database server
Loaded: loaded (/usr/lib/systemd/system/mariadb.service; disabled; vendor preset: disabled)
Active: failed (Result: exit-code) since Mon 2019-04-15 17:16:38 UTC; 4s ago
Process: 2864 ExecStartPre=/usr/libexec/mysql-prepare-db-dir %n (code=exited, status=1/FAILURE)
Process: 2841 ExecStartPre=/usr/libexec/mysql-check-socket (code=exited, status&#