default
DMZ-Black
DMZ-White
gnome
handhelds
hicolor
HighContrast
HighContrastInverse
Humanity
Humanity-Dark
locolor
LoginIcons
LowContrast
redglass
ubuntu-mono-dark
ubuntu-mono-light
unity-icon-theme
whiteglass

unity --reset

gsettings set org.gnome.desktop.interface icon-theme 'Unity-icon-theme'

gsettings set org.gnome.desktop.interface icon-theme 'Ubuntu-mono-dark'

gsettings set org.gnome.desktop.interface icon-theme 'Ubuntu-mono-light'

$ gsettings set com.canonical.Unity.Panel systray-whitelist "['all']"