...
echo "UPDATE mysql.user SET host='%' WHERE user='root'; FLUSH PRIVILEGES;" | mysql -S /var/run/mysqld/mysqld_13307.sock -uroot
mysql: [Warning] Using a password on the command line interface can be insecure.
echo 'SELECT host,user,plugin,password_last_changed FROM mysql.user;' | mysql -S /var/run/mysqld/mysqld_13307.sock -uroot -t
mysql: [Warning] Using a password on the command line interface can be insecure.
+-----------+----------------------------+-----------------------+-----------------------+
| host      | user                       | plugin                | password_last_changed |
+-----------+----------------------------+-----------------------+-----------------------+
| %         | root                       | caching_sha2_password | 2025-04-30 10:19:17   |
| localhost | mysql.infoschema           | caching_sha2_password | 2025-04-30 10:19:13   |
| localhost | mysql.pxc.internal.session | caching_sha2_password | 2025-04-30 10:19:13   |
| localhost | mysql.pxc.sst.role         | caching_sha2_password | 2025-04-30 10:19:13   |
| localhost | mysql.session              | caching_sha2_password | 2025-04-30 10:19:13   |
| localhost | mysql.sys                  | caching_sha2_password | 2025-04-30 10:19:13   |
| localhost | percona.telemetry          | caching_sha2_password | 2025-04-30 10:19:15   |
+-----------+----------------------------+-----------------------+-----------------------+
mysqlshow -S /var/run/mysqld/mysqld_13307.sock -uroot
mysqlshow: [Warning] Using a password on the command line interface can be insecure.
+--------------------+
|     Databases      |
+--------------------+
| information_schema |
| mysql              |
| performance_schema |
| sys                |
+--------------------+
kill -15 332245
################################################################################
################################################################################

# So wird das BDMS behandelt:

> service mysql_port@13307.bootstrap start
> service mysql_port@13307.bootstrap status
> service mysql_port@13307.bootstrap stop

> service mysql_port@13307 start
> service mysql_port@13307 status
> service mysql_port@13307 stop

> mysqlshow -S /var/run/mysqld/mysqld_13307.sock
> echo 'SELECT host,user,plugin,password_last_changed,authentication_string FROM mysql.user;' | mysql -S /var/run/mysqld/mysqld_13307.sock -t
> echo "SHOW VARIABLES LIKE '%ssl%';" | mysql -S /var/run/mysqld/mysqld_13307.sock -t
> echo "SHOW VARIABLES WHERE variable_name IN ('hostname','wsrep_node_name','wsrep_cluster_name','port','ssl_ca','ssl_cert','ssl_key'); SHOW STATUS LIKE '%Ssl_server_not_%';" | mysql -S /var/run/mysqld/mysqld_13307.sock -t
> mysqlshow --ssl-ca=/etc/mysql/ca.pem --ssl-mode=VERIFY_CA -S /var/run/mysqld/mysqld_13307.sock

zum kompletten und unwiederbringlichen entfernen dieser MySQL-DBMS-Instanz,
ist nur dieses Kommando nötig:
	/root/bin/Neue_MySQL-Instanz_löschen.sh 13307


real	0m32.173s
user	0m4.630s
sys	0m1.172s