Well, this didn’t work. I followed all the steps on the setup site of radicale.org for a local install, and got the following in the last few commands they cited:
mark@debian:~$ systemctl --user enable radicale
mark@debian:~$ systemctl --user start radicale
mark@debian:~$ systemctl --user status radicale
● radicale.service - A simple CalDAV (calendar) and CardDAV (contact) server
Loaded: loaded (/home/mark/.config/systemd/user/radicale.service; enabled; ve
Active: failed (Result: exit-code) since Thu 2018-08-23 17:20:01 EDT; 13s ago
Process: 15801 ExecStart=/usr/bin/env python3 -m radicale (code=exited, status
Main PID: 15801 (code=exited, status=1/FAILURE)
Aug 23 17:20:00 debian systemd[2132]: radicale.service: Main process exited, cod
Aug 23 17:20:00 debian systemd[2132]: radicale.service: Unit entered failed stat
Aug 23 17:20:00 debian systemd[2132]: radicale.service: Failed with result 'exit
Aug 23 17:20:01 debian systemd[2132]: radicale.service: Service hold-off time ov
Aug 23 17:20:01 debian systemd[2132]: Stopped A simple CalDAV (calendar) and Car
Aug 23 17:20:01 debian systemd[2132]: radicale.service: Start request repeated t
Aug 23 17:20:01 debian systemd[2132]: Failed to start A simple CalDAV (calendar)
Aug 23 17:20:01 debian systemd[2132]: radicale.service: Unit entered failed stat
Aug 23 17:20:01 debian systemd[2132]: radicale.service:
The install site (Tutorial) seemed to go well, and provided a web interface to create links to created caldav calendar files. It did provide these links, and thus supposedly created these caldav calendar files, but that didn’t work with DAVdroid (the URL was rejected). Neither Evolution nor Lightning (Thunderbird) seemed to know what to do with it when I tried to open it with them (Evolution acknowledged it as a calendar file, but assumed it had to be associated with and served by Yahoo, due to my email address (IE, it was not acknowledging the local Radicale server.)
Earlier I had went through a3nm’s blog and his/her update, and it’s confusing as ever (however, kudos to him/her for succeeding, and for at least attempting to explain how he/she did so).
Anyway, for something that supposedly “works out of the box”, well, my experience suggests otherwise. I think I may give up on Radicale and try something else.