Activate php extension, Current Value

[Geza Hidasi]

Some days ago, I put these questions on a wrong place. Now, I want to repeat them:
Bevore going to install seeddms-5.1.7 on a PC, I tried it on VirtualBox, Ubuntu 18.04 server (regular installation, method A. Kasenides). During installation no problems, but after starting install.php I got the message:

PHP extension : php_'see current value' : Not found
=> Current value : pdo__DBC_DBTYPE_
=> Activate PHP extension

What to do? Which php extension? And which current value? Please help me to get the program running! Maybe, the questions are very trivial, but I am no Linux-expert. Thanks!

[Uwe Steinmann]

What database type did you choose? Check for dbType in settings.xml. It should be mysql or sqlite

[Geza Hidasi]

Thanks for fast reaction! My db is mysql.

[Geza Hidasi]

Additional info, maybe useful:
Apache version: Apache/2.4.29 (Ubuntu)
PHP version: 7.2.5-0ubuntu0.18.04.1
PHP include path: :.:/usr/share/php

[Uwe Steinmann]

Check if your php has mysql support. You should have a virtua debian package php_pdo_mysql

[Geza Hidasi]

Trying
apt install php-pdo-mysql
results:

"Hinweis: >>php7.2-mysql<< wird an Stelle von >>php-pdo-mysql<< gewählt.
php7.2-mysql ist schon die neueste Version (7.2.5-0ubuntu0.18.04.1)"

(I use german as system-language.)

[Uwe Steinmann]

Are you sure the dbDriver in your settings.xml is set to the right value. According the error msg it appears to be still the value from settings.xml.template

[Geza Hidasi]

You are right! In my greenness, I supposed, the script would save the parameter by itself in settings. Sorry! The DMS looks very good, it is running even on a VM very smoothly. Even the full-text-search works good! Thanks for your help!