Install Openmediavault on Debian Wheezy/7

First Install Debian minimal

Configure your Debian repositories

Update the repository sources and add the contrib and non-free repositories.

nano /etc/apt/sources.list

It should look something like this:

deb http://ftp.us.debian.org/debian/ wheezy main contrib non-free
deb-src http://ftp.us.debian.org/debian/ wheezy main contrib non-free

deb http://security.debian.org/ wheezy/updates main contrib non-free
deb-src http://security.debian.org/ wheezy/updates main contrib non-free

# wheezy-updates, previously known as 'volatile'
deb http://ftp.us.debian.org/debian/ wheezy-updates main contrib non-free
deb-src http://ftp.us.debian.org/debian/ wheezy-updates main contrib non-free

Setup your sources.list

echo "deb http://packages.openmediavault.org/public kralizec main" > /etc/apt/sources.list.d/openmediavault.list

Set up your keys

wget -O - http://packages.openmediavault.org/public/archive.key | apt-key add -

Update Package Repository

apt-get update

Installation

apt-get install openmediavault

Initialize OpenMediaVault

omv-initsystem

Reboot

shutdown -r now

Tid bits:

omv-firstaid