In next days we will upgrade our 3.5.1 to newest 4.2.x.
I know we must raise PHP to 7.x and Python to 3.x.
Our matomo relys on RedHat 7.x and this means not all PHP/python modules are available in our repo channels.
a) is it mandatory to install php-curl extension (unavailable in our RH software collection) or can we have a working 4.x version without this PHP module?
b) besides to bring python to 3.x, are there specific python modules to install (we heavly use log analytics)?
c) Coming from 3.5.1, we have to upgrade our MySQL (from the command line calling ./path/to/matomo/console core:update). Is it needed to do also any db conversion for matomo 4.x?
Thanks in advance for your precious help.