Well, I spend few time to understand the first step is to set a password, otherwise I am unable to install or use apps...
So now:
o Logitech Media Sever is running correctly,
o SSHD is working with the user "admin" and the password defined for the admin user,
o Midnight Commander is Ok
o Transmission is Ok, very impressive.
I have a SSD connected to the USB port and managing copy from it to the drive in the unit.
edit 07/29 = transmission status