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I run a headless Pi in a weather station using cellular data. Every night after midnight it does an 8MB download - I don't know what it is, but that's what vnstat tells me. Being as how the system runs on cellular I'd like to kill that.

Had a look in /etc/cron.daily and found a script called apt. It seems to call apt-get update which coincidentally downloads about 8MB... when I run it manually. I am not keen to hack the script because it has lots of variables and parameters and ifs and stuff. Life would get a bit ugly if I kill the system.

So I am leaning towards just getting rid of the script altogether. Perhaps someone knows something about this? I am using DietPi

Ian Boag
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There is no need to have a cron job running apt-get update on a regular basis. You can remove that job safely

Just running it manually should be enough.

My recommendation is that it be run before any new software is installed.

Then afterwards, you might want to run apt-get check to look for interdependencies, but it rarely finds anything.

If it finds something amiss, you can run apt-get autoremove to clean things up.

Before any of this, it is always a good idea to do a full shutdown. Give it a minute or two for the green light to stop. Then pull the SD card and put it in an adapter and install in your PC, then use Win32DiskImager to take a snapshot of your system just in case you need to restore it back to the way it is before you start changing things.

SDsolar
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