The new version of Proxmox 3.1 has been released. If you have the existing Proxmox installation, you can easily upgrade to this Proxmox 3.1 easily. You will need a good internet connection because this upgrade will download about 90 MB files from the net. The good thing when we upgrade to Proxmox 3.1 is that the settings and VM's will not changed.
How to upgrade to Proxmox 3.1 via command line
First, login to Proxmox server. I use putty to connect to my Proxmox console from a Windows machine
Then, open the file /etc/apt/sources.list. This file must contains at least these three items.
deb http://http.at.debian.org/debian wheezy main contrib
deb http://download.proxmox.com/debian wheezy pve
deb http://security.debian.org/ wheezy/updates main contrib
Use this command to open the /etc/apt/sources.list
nano /etc/apt/sources.list
Next update your server
apt-get update
Now perform the upgrade process
apt-get dist-upgrade
Once finished, reboot your server and check if Proxmox is upgraded to Proxmox 3.1
