I tried to change root password based on the tutorial at
https://www.digitalocean.com/community/tutorials/how-to-reset-your-mysql-or-mariadb-root-password and everything was ok except step 5 - restart the database server.
I can't do that. Please check it out:
mariadb.service - MariaDB 10.11.14 database server
Loaded: loaded (/usr/lib/systemd/system/mariadb.service; enabled; vendor preset: disabled)
Drop-In: /etc/systemd/system/mariadb.service.d
└─migrated-from-my.cnf-settings.conf
Active: failed (Result: exit-code) since Sat 2025-09-06 07:13:05 BST; 4min 31s ago
Docs: man:mariadbd(
https://mariadb.com/kb/en/library/systemd/ Process: 82635 ExecStart=/usr/sbin/mariadbd $MYSQLD_OPTS $_WSREP_NEW_CLUSTER $_WSREP_START_POSITION (code=exited, status=1/FAILURE)
Process: 82625 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: 82623 ExecStartPre=/bin/sh -c systemctl unset-environment _WSREP_START_POSITION (code=exited, status=0/SUCCESS)
Main PID: 82635 (code=exited, status=1/FAILURE)
Status: "MariaDB server is down"
Sep 06 07:13:05 srv.com mariadbd[82635]: 2025-09-06 7:13:05 0 [ERROR] InnoDB: Plugin initialization aborted with error Generic error
Sep 06 07:13:05 srv.com mariadbd[82635]: 2025-09-06 7:13:05 0 [Note] InnoDB: Starting shutdown...
Sep 06 07:13:05 srv.com mariadbd[82635]: 2025-09-06 7:13:05 0 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed.
Sep 06 07:13:05 srv.com mariadbd[82635]: 2025-09-06 7:13:05 0 [Note] Plugin 'FEEDBACK' is disabled.
Sep 06 07:13:05 srv.com mariadbd[82635]: 2025-09-06 7:13:05 0 [ERROR] Could not open mysql.plugin table: "Unknown storage engine 'Aria'". Some plugins may be not loaded
Sep 06 07:13:05 srv.com mariadbd[82635]: 2025-09-06 7:13:05 0 [ERROR] Failed to initialize plugins.
Sep 06 07:13:05 srv.com mariadbd[82635]: 2025-09-06 7:13:05 0 [ERROR] Aborting
Sep 06 07:13:05 srv.com systemd[1]: mariadb.service: Main process exited, code=exited, status=1/FAILURE
Sep 06 07:13:05 srv.com systemd[1]: mariadb.service: Failed with result 'exit-code'.
Sep 06 07:13:05 srv.com systemd[1]: Failed to start MariaDB 10.11.14 database server.
It looks like I have another instance of MariaDB because all my websites work fine at the moment, CWP works fine too
https://drive.google.com/file/d/1yMnBGR5a7IO3kibchbPAc-pTS1Iny72T/view?usp=sharingReboot server helped to start MariaDB with CWP