The fix seems to be 
here:  
https://unix.stackexchange.com/questions/401759/automatically-login-on-debian-9-2-1-command-line

Midway through the page someone was working with a serial instead of a 
virtual terminal.  I'm not exactly sure of the impact of the edit in the 
logind.conf file, but the combination shown there works.  

On Thursday, April 15, 2021 at 4:54:06 PM UTC-4 Paul Beam wrote:

> This is a tad more sinister than it appears.  In 
> /etc/systemd/system/getty.target.wants/ are 3 files: [email protected], 
> [email protected], and [email protected].  I have changed them 
> all, and none have had any impact.  A 'systemctl cat [email protected]' 
> shows the unchanged unit file /lib/systemd/system/[email protected].    
> Although I did desire to not alter the original systemd unit file in /lib, 
> I may need to do that and see if it makes a difference.
>
> On Thursday, April 15, 2021 at 2:33:34 PM UTC-4 Paul Beam wrote:
>
>> Thanks.  That makes sense.  I was barking up the wrong tree and just 
>> totally forgot about getty.
>>
>> On Thursday, April 15, 2021 at 12:57:01 PM UTC-4 [email protected] 
>> wrote:
>>
>>> At Thu, 15 Apr 2021 07:44:05 -0700 (PDT) [email protected] 
>>> wrote: 
>>>
>>> > 
>>> > Anyone know how to allow auto root login from the serial console 
>>> without a 
>>> > password while still requiring a password for ssh? This is really a 
>>> worst 
>>> > case recovery type thing where someone changes the default password 
>>> and 
>>> > forgets the new password. Physical security should be adequate in this 
>>> > case. 
>>>
>>> man getty 
>>>
>>> Specificly: 
>>>
>>> -a, --autologin username 
>>> Automatically log in the specified user without asking for a 
>>> username or password. Using this option causes an -f username 
>>> option and argument to be added to the /bin/login command line. 
>>> See --login-options, which can be used to modify this option's 
>>> behavior. 
>>>
>>> Note that --autologin may affect the way how agetty initializes 
>>> the serial line, because on auto-login agetty does not read from 
>>> the line and it has no opportunity optimize the line setting. 
>>>
>>> and also: 
>>>
>>> -l, --login-program login_program 
>>> Invoke the specified login_program instead of /bin/login. This 
>>> allows the use of a non-standard login program. Such a program 
>>> could, for example, ask for a dial-up password or use a differ†
>>> ent password file. See --login-options. 
>>>
>>> -o, --login-options "login_options" 
>>> Options and arguments that are passed to login(1). Where \u is 
>>> replaced by the login name. For example: 
>>>
>>> --login-options '-h darkstar -- \u' 
>>>
>>> See --autologin, --login-program and --remote. 
>>>
>>> Please read the SECURITY NOTICE below before using this option. 
>>>
>>> -p, --login-pause 
>>> Wait for any key before dropping to the login prompt. Can be 
>>> combined with --autologin to save memory by lazily spawning 
>>> shells. 
>>>
>>>
>>> systemd files of interest: 
>>>
>>> /etc/systemd/system/getty.target.wants/[email protected] 
>>> /lib/systemd/system/[email protected] 
>>>
>>> The former is a symlink to the second, but you don't want to mess with 
>>> the 
>>> second, but instead copy the second to someplace 
>>> (/usr/local/lib/systemd/system/ probably) and modify it (maybe rename it 
>>> to 
>>> /lib/systemd/system/[email protected]) and then change the 
>>> /etc/systemd/system/getty.target.wants/[email protected] symlink. 
>>>
>>> Robert Heller -- Cell: 413-658-7953 <(413)%20658-7953> GV: 978-633-5364 
>>> <(978)%20633-5364> 
>>> Deepwoods Software -- Custom Software Services 
>>> http://www.deepsoft.com/ -- Linux Administration Services 
>>> [email protected] -- Webhosting Services 
>>>
>>>
>>>

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