sorry for the delay to your question.
>Is that the password for DB user setup to run a moodle, or is it the superuser password?
it's the chosen user setup for my moodle-installation, not a superuser-password. But it seems to be something temporal by ionos. In the meantime I updated (manually) to moodle 3.8 as mentioned above:
- rename old ionos-installed moodle (3.5)
- unpack moodle 3.8 in the same folder-structure as the original ionos-installation
- backup moodle-db, delete moodle-db, create new moodle-db with actual mysql, restoring moodle-db
- copy back the .htgcld34ieljdj.data - folder, config.php (with new DB-access data) from the ionos-installation to the manual unpacked version (3.5 -> 3.8)
It worked immediately without the strange .htxt8cvv.appconfig.php - file. Seems not to be needed
I also fixed the opcache-warning be learning, that the needed php.ini-file has to be placed in the admin-folder of moodle
The last things driving my crazy with ionos/1&1 is that I'm not able to activate slasharguments whatever I do and that h5p can be installed as plugin but when selecting h5p in "new activity", the h5p-editor is not working (javascript-errors, "loading, please wait"-loop forever). But that's another issue and not for this thread.
To sum up my ionos-odyssey:
- Install moodle (3.5) via the prepared 1&1 app-package (this app automatically creates db on older mysql which does not work with moodle 3.7+)
- rename this ionos-installation of moodle (3.5) as backup
- unpack moodle 3.8 in the same folder-structure as the ionos-installation
- backup moodle-db, delete moodle-db, create new moodle-db with actual mysql, restoring moodle-db
- copy back the .htgcld34ieljdj.data - folder, config.php to moodle 3.8-in-old-folder-structure
- edit config.php with new DB-access data
- fix opcache with php.ini in admin-folder of moodle
- fix codepage by setting dbcollation' => 'utf8mb4_unicode_ci in config.php and in moodle-db
- open: https (not so important for me)
- open: php_extension xmlrpc: possibly not fixable at ionos
- open: slasharguments (driving me crazy), tried with .htaccess, php.ini -> nothing...
- open: h5p plugin editor not working
Thanks for all the help.
Patricio