Chapter 7 and 8 of LSF211

Why don't these chapters make more use of the excellent a2* commands available in Debian/Ubuntu? e.g. Lab 8.1:

root@debian:~# a2enmod cgi
Your MPM seems to be threaded. Selecting cgid instead of cgi.
Enabling module cgid.
To activate the new configuration, you need to run:
  systemctl restart apache2

Here for example it decided that the cgid module was preferable to cgi as other configuration directives work better with it.

I would also rather always edit the files under /etc/apache2/{conf,mods,sites}-available than make the files in /etc/apache2/{conf,mods,sites}-enabled directories and then execute the related a2enmod, a2ensite or a2enconf commands to make the configuration changes active.

There was one instance of the a2enmod used in exercise 8.1 which is actually the first instance when I followed the instructions given in these two chapters labs... The greatest advantage is that a2enmod handles also the dependency checking of needed modules so that it enables dependencies of the module requested to be enabledof which I put an example below.

root@debian:~# a2enmod lbmethod_heartbeat
Considering dependency proxy_balancer for lbmethod_heartbeat:
Considering dependency proxy for proxy_balancer:
Module proxy already enabled
Considering dependency alias for proxy_balancer:
Module alias already enabled
Considering dependency slotmem_shm for proxy_balancer:
Enabling module slotmem_shm.
Enabling module proxy_balancer.
Enabling module lbmethod_heartbeat.
To activate the new configuration, you need to run:
  systemctl restart apache2

To be honest, I've long wished that other distributions would make use of this excellent solution in Debian for handling Apache configs.

Also I noticed that the chapter 7 knowledge check starts with this claim:

The default configuration of the Apache web server usually listens only to the loopback interface. True or False?

For which the correct answer required is actually incorrect as Debian 10, CentOS 8, Fedora Server and OpenSUSE Tumbleweed ( at least Tumbleweed, didn't test others) configure by default Apache to listen on *:80 and not on localhost.