restarting Gnome in 16.04

[Glenn / Lenny]

Hi,
I downloaded Ubuntu Gnome 16.04, and I ran Orca and am trying to install Voxin.
I must add that this is very slow and unresponsive.
I am using an Intel NUC PPYH, with 8 GB of RAM.
Also, this is a live version with a persistence file on an 8GB SD card.
I am working on fixing the GRUB on the NUC with this live version.
Although I got some directory errors with the Voxin 1.00 installation, I am hopeful that it was successful.
I don't want to mess with rebooting, because it takes a while to get it to boot to the SD card.
So I want to restart Gnome, and I have tried:
sudo service lightdm restart
and
sudo service gdm restart

Neither works.
I did look on-line and found no further answers.
Any more suggestions?
Thanks.
Glenn
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