http://omv-extras.org/simple/index.php?id=how-to-install-omv-extras-plugin
Install OMV-extras plugin
To install on OpenMediaVault 1.x (Kralizec):
From OMV web interface (preferred method)
Install all updates from the Update Manager tab.
Download the plugin to enable this repository here.
Go to the plugin tab in OMV’s web interface.
Upload the file.
Select the newly uploaded plugin openmediavault-omvextrasorg
Click on Install.
Refresh page.
Go to the plugin tab and click Check.
From command line as root
wget http://omv-extras.org/openmediavault-omvextrasorg_latest_all.deb
dpkg -i openmediavault-omvextrasorg_latest_all.deb
apt-get update
To install on OpenMediaVault 0.5.x (Sardaukar):
From OMV web interface (preferred method)
Install all updates from the Update Manager tab.
Download the plugin to enable this repository here.
Go to the plugin tab in OMV’s web interface.
Upload the file.
Select the newly uploaded plugin openmediavault-omvextrasorg
Click on Install.
Refresh page.
Go to the plugin tab and click Check.
From command line as root
wget http://omv-extras.org/debian/pool/main/o/openmediavault-omvextrasorg/openmediavault-omvextrasorg_0.6.25_all.deb
dpkg -i openmediavault-omvextrasorg_0.6.25_all.deb
apt-get update