Downloading ISO Directly to Proxmox Using Command Line

This is usually the faster way to get any iso to proxmox, especially if you are connecting to proxmox via some not so fast internet connection. But if you still prefer to use the web GUI, please refer to this post on how to do it via the web UI.

Go to the directory where iso's are being kept in proxmox
# cd /var/lib/vz/template/iso

If you have not downloaded the ISO, you can download it directly in this directory. For example I want to download a Centos 8 ISO
# wget http://centos.ipserverone.com/centos/8-stream/isos/x86_64/CentOS-Stream-8-x86_64-20191219-dvd1.iso

Once done, refresh the webUI