Add No-Subscription Proxmox Repository
You’ll need to edit the sources.list file for apt.
$ nano /etc/apt/sources.list
# PVE pve-no-subscription repository provided by proxmox.com,
# NOT recommended for production use
deb http://download.proxmox.com/debian/pve stretch pve-no-subscription
$ apt-get update -y
Do not forget to add the apt cache configuration if you’re in a Proxi-ed network
- Acquire::http:Proxy “http://aptcacher.domain.tld:3142”;
OR
- Acquire::http:Proxy “http://proxy.domain.tld:port”;