If you are accessing your OMV server with webmin you will need a java client for the File Explorer.
1) on windows machines go to java.com and install it.
2) to install webmin
start a root ssh session with Putty to your server and login
3) go to an area to download a file. I usually go to :
cd /home
4) then get webmin
5) install webmin
dpkg --install webmin_1.590_all.deb
6) some dependencies likely did not install so run this:
apt-get -f install
7) login to webmin
https://ipofyoursever:10000 (ip of your server example 192.168.1.123)
at first you login as root with root pass but i'll show you how to setup so using same admin user as Open Media Vault
now you can use the File Explorer in Webmin
On Left column click on "Others" then click on "File Manager"
9) SSH in Webmin we need to install a SSH2 client.
In Webmin click on "Webmin" on the left then click on "Webmin Configuration".
Then on right you need to click on "Webmin Modules".
Then in "Install" tab you want to put a bullet in "Third Party module from"
Then on the right side click on the grey box to pull up 3rd party modules.
Scroll down to "SSH2 login" and click on it to select it then click on "install module"
Once install we can now start a SSH session without putty.
In Webmin on left click on "Others" then "SSH2 login"
10) to add the "admin" user as a webmin user in Webmin so you can use same codes to login in webmin as Open Media Vault
in webmin click on upper left click on "Webmin" then click on "Webmin Users"
on right click on "Create a new Webmin user" then in Username put in "admin" then on Password drop down the box and
select "Unix Authentication" then below click on create.
Now you can log into webmin using "admin" as user.
11) to remove old SSH client login from menu that no longer works with debian do the following: