I have been successfully running WeeWX (currently V3.8.2) on a Raspberry Pi 
Zero W with an RTC for some time. The Pi is running Raspian Stretch (and 
using NGINX as a web server). I would like to update Raspian by running 
sudo apt-get update and either sudo apt-get upgrade or sudo apt-get 
dist-upgrade. I have a couple of questions:

I assume I should:
1.Shut down the Pi
2. Back up my SD card on another PC (in case I really mess things up)
3. Restart the PI
4. Stop WeeWX
5. Run the commands for Raspian update/upgrade
6. Start WeeWX

Does this make sense?
Does anyone have guidance for apt-get upgrade vs apt-get dist-upgrade for 
my case?
Will either upgrade or dist-upgrade put back the fake-hwclock, which I 
purged when adding my RTC?
Will either upgrade or dist-upgrade mess up the udev rule I added to 
/etc/udev (KERNEL=="rtc0", RUN+="/sbin/hwclock --rtc=$root/$name --hctosys")to 
have the RTC update the time on boot? 
Anything else I should do or be aware of - any other advice or suggestions?

Thanks in advance.

Phil

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