Logging in to the raspberry(ies) to update them on a regular basis takes time and effort. Both are currently dear.
Also: while the catcam is taking pictures, you can’t update the rpi-binaries.
So I made this nice script, which first suspends the catcam-operation while renaming the script from the cronjob, then does all updates, reverts the renaming and then reboots the MCU.
# author: Marcel Petrick (firstname.lastname@example.org)
mv /home/pi/Desktop/webcam/regulargif.sh /home/pi/Desktop/webcam/regulargif.sh1
sudo apt-fast update && sudo apt-fast dist-upgrade -y
sudo apt-get autoclean
sudo apt-get autoremove
mv /home/pi/Desktop/webcam/regulargif.sh1 /home/pi/Desktop/webcam/regulargif.sh
Make it executeable via ‘sudo chmod +X updateCatcam.sh’ and also add it as cronjob (once a day).