The downloads for moodle (.tgz or .zip) come with the hidden git directories and files.
An Admin tool be developed for web based Terminal ... inside moodle - as an admin add-on.
A support account is created (id 3) that has login/pass and a support key that OP of server can change - like a passphrase.
That is auto created like Guest account but login/pass and support key can be changed.
Support person must provide the support key. That person is then auto logged onto the Web based Terminal in the account root.
Things the above could not do ... but might ... change my.cnf conf. Add a proper/correct cron job setup.
Might actually be able to install moosh and MySQLTuner.
'SoS', Ken