How does centos httpd configuration map on to ubuntu apache2 config ?

system info:

$ uname -a
Linux larrycotton-Latitude-E7440 5.15.0-58-generic #64~20.04.1-Ubuntu SMP Fri Jan 6 16:42:31 UTC 2023 x86_64 x86_64 x86_64 GNU/Linux

$ cat /etc/os-release 
NAME="Ubuntu"
VERSION="20.04.5 LTS (Focal Fossa)"
ID=ubuntu
ID_LIKE=debian
PRETTY_NAME="Ubuntu 20.04.5 LTS"
VERSION_ID="20.04"
HOME_URL="https://www.ubuntu.com/"
SUPPORT_URL="https://help.ubuntu.com/"
BUG_REPORT_URL="https://bugs.launchpad.net/ubuntu/"
PRIVACY_POLICY_URL="https://www.ubuntu.com/legal/terms-and-policies/privacy-policy"
VERSION_CODENAME=focal
UBUNTU_CODENAME=focal

$ apache2 -v
Server version: Apache/2.4.41 (Ubuntu)
Server built:   2023-01-23T18:36:09

Hi

I have an apache server configuration which I have used on centos httpd - some of which I would like to transfer accross to Ubuntu apache2. I have installed and run up a vanilla apache2 and that seems to be running fine, but I noticed the configuration structure seems to be a little different and was wondering if someone could answer some questions regarding how I can configure it (specifically to use ssl and wsgi).

1) It looks like to install the wsgi module I do:

$ apt-get install libapache2-mod-wsgi

When I do this I notice it installs libpython2.7 even though the default system python is 3.8. Is that because mod_wsgi is built with python 2.7 and I have to use python 2 with it ?
If so is it possible to get a version of mod_wsgi that is built against python 3.8 ? Or would I have to build that myself ?

2) It looks like in order to load a module you need to put the load statement in a file called <modname>.load in the mods-available directory. Is that correct ?

3) In my httpd config I configure my https parameters, both global and for VirtualHosts in conf.d/ssl.conf. Does anyone know what the equivalent file is for apache2 on Ubuntu ? I see there is an ssl.conf in mods-available and mods-enabled. It looks like apache2.conf includes mods-enabled and mods-enabled simply contains links to mods-available, so can I simply transfer across my httpd ssl.conf to mods-available/ssl.conf (except see Q4 below), or is different syntax required?

4) In my ssl.conf I breate a VirtualHost something like:
Listen 8443
<VirtualHost *:8443>
I notice that on Ubuntu apacher2 there is a file called ports.conf that contains Listen ports for modules. Do I need to put Listen statements for VirtualHost ports in that file ?

Hi,

modules live in /etc/apache2/mods-available and are loaded if there is a link to them in /etc/apache2/mods-enabled. You can handle the links manually but it is "better" to use the a2enmod and a2dismod. Note there are also a2enconf, a2disconf, a2ensite,... commands and related directories.

Evo2.

Thank you for your reply and your pointers to the helper scripts.

It looks like the Listen directive for the virtual host works fine when placed in ssl.conf.

My basic "Hello world" setup now seems to be working (at least locally).

Thank you again for your help