This works on a Pi 4, and should work on a Pi 3, but to work on a Pi Zero you would have to figure out how to compile your own client. More info in this thread on the Proxmox forums.
Run the following command. If you get arm64, it's 64bit, otherwise you'll see armv7l which is 32bit.
uname -m
This script can be used to backup essential configuration files from the Proxmox Virtual Enivronment (PVE) host.
The script will create backups using tar with specified backup prefix and date and time stamp in the file name. Script will also delete backups that are older then number of days specified.
To create backup script that will be executed every day we can create backup script in /etc/cron.daily/ folder. We need to make it writeable by root (creator) only, but readable and executable by everyone:
touch /etc/cron.daily/pvehost-backup