I had to do this for an older version of Proxmox as web interface was broken.

Edit cron for proxmox:

vim /etc/cron.d/vzdump

e.g. Output:

[html]
# cluster wide vzdump cron schedule
# Atomatically generated file – do not edit

PATH=”/usr/sbin:/usr/bin:/sbin:/bin”

0 1 * * 1,4,6 root vzdump 101 103 104 105 –quiet 1 –mode snapshot –mailto hello@email.com –compress gzip –storage backupdrive