Use a cron daemon to update a raspberry pi everyday at 3am.
This repository assumes you have the update script in /home/pi/Update.
After booting into the pi via ssh, edit your cron tab with crontab -e and add:
0 3 * * * /home/pi/Update/update 2>&1 >/home/pi/Update/output.log
This command will run the update script at 3am local to the raspberry pi system time. Any errors the update process runs into will be output to the output.log file in the same folder as the update script.