[ale] Remove systemd network handling

[Alex Carver]

Raspbian.  It worked fine under the normal configuration until an update
a few months ago allowed an automated apt update process to sneak in.
The update then rewrote everything and it was unstable afterwards.

On 2021-09-20 06:59, DJ-Pfulio via Ale wrote:
> Which distro?
> 
> Many have deprecated and haven't used /etc/network/interfaces in a few years. This is a separate issue from systemd.
> 
> Any systemd service can be disabled, then "mask"ed to prevent it from running.
> $ sudo systemctl list-units
> will show the .services you can do that with.  Getting the wrong services can make for a bad day.
> 
> 
> 
> On 9/19/21 6:55 PM, Alex Carver via Ale wrote:
>> Ok, I'm having some trouble figuring out how to completely remove
>> systemd from handling network connections.  For some reason it decides
>> to bounce the connection on a couple machines every few days with no
>> information in the logs as to why.  It causes havoc with a bunch of data
>> collection scripts that are connected to instruments. I completely lose
>> connection to any of the instruments and can't recover without fully
>> restarting the scripts. I don't need the connection managed for me, it's
>> perfectly fine statically configured.
>>
>> The device is already statically defined in /etc/network/interfaces, I'm
>> not using DHCP on this particular machine, and there's no need to be
>> looking for hotplug events because the instruments and computer are all
>> bolted together in the same chassis.
>>
>> I still seem to have a networking.service listed but I've not found a
>> way to stop everything. Nearly everything I find in searching is how to
>> enable it which isn't what I want.
>>
>>
>> As an aside, are there any good explanations for how to remove user
>> management and login control from systemd as well?  I don't need seats
>> or any of the fancy features on this machine, that's just overhead for
>> no good value so I'd rather to back to plain logins.
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> 
>