无论我做什么，Mariadb 都无法启动。它总是看起来像：
Setting up mariadb-server-10.1 (10.1.23-9+deb9u1) ...
Job for mariadb.service failed because the control process exited with error code.
See "systemctl status mariadb.service" and "journalctl -xe" for details.
invoke-rc.d: initscript mysql, action "start" failed.
● mariadb.service - MariaDB database server
Loaded: loaded (/lib/systemd/system/mariadb.service; enabled; vendor preset: enabled)
Active: failed (Result: exit-code) since Wed 2017-07-05 15:44:03 CEST; 9ms ago
Process: 9713 ExecStart=/usr/sbin/mysqld $MYSQLD_OPTS $_WSREP_NEW_CLUSTER $_WSREP_START_POSITION (code=exited, status=1/FAILURE)
Process: 9623 ExecStartPre=/bin/sh -c [ ! -e /usr/bin/galera_recovery ] && VAR= || VAR=`/usr/bin/galera_recovery`; [ $? -eq 0 ] && systemctl set-environment _WSREP_START_POSITION=$VAR || exit 1 (code=exited, status=0/SUCCESS)
Process: 9619 ExecStartPre=/bin/sh -c systemctl unset-environment _WSREP_START_POSITION (code=exited, status=0/SUCCESS)
Process: 9616 ExecStartPre=/usr/bin/install -m 755 -o mysql -g root -d /var/run/mysqld (code=exited, status=0/SUCCESS)
Main PID: 9713 (code=exited, status=1/FAILURE)
Status: "MariaDB server is down"
Jul 05 15:43:59 v22015121382329682 systemd[1]: Starting MariaDB database server...
Jul 05 15:44:00 v22015121382329682 mysqld[9713]: 2017-07-05 15:44:00 140711653892672 [Note] /usr/sbin/mysqld (mysqld 10.1.23-MariaDB-9+deb9u1) starting as process 9713 ...
Jul 05 15:44:03 v22015121382329682 systemd[1]: mariadb.service: Main process exited, code=exited, status=1/FAILURE
Jul 05 15:44:03 v22015121382329682 systemd[1]: Failed to start MariaDB database server.
Jul 05 15:44:03 v22015121382329682 systemd[1]: mariadb.service: Unit entered failed state.
Jul 05 15:44:03 v22015121382329682 systemd[1]: mariadb.service: Failed with result 'exit-code'.
dpkg: error processing package mariadb-server-10.1 (--configure):
subprocess installed post-installation script returned error exit status 1
dpkg: dependency problems prevent configuration of default-mysql-server:
default-mysql-server depends on mariadb-server-10.1; however:
Package mariadb-server-10.1 is not configured yet.
dpkg: error processing package default-mysql-server (--configure):
dependency problems - leaving unconfigured
dpkg: dependency problems prevent configuration of mysql-server:
mysql-server depends on default-mysql-server; however:
Package default-mysql-server is not configured yet.
dpkg: error processing package mysql-server (--configure):
dependency problems - leaving unconfigured
Errors were encountered while processing:
mariadb-server-10.1
default-mysql-server
mysql-server
我已经卸载并重新安装了所有 mariadb 包，但它不起作用。
我怎样才能解决这个问题？