make ubuntu business casual

to make ubuntu business casual - make it black remove background:

         

gsettings set org.gnome.desktop.background picture-options 'none'
gsettings set org.gnome.desktop.background picture-uri ''
gsettings set org.gnome.desktop.background primary-color '#000000'
gsettings set org.gnome.desktop.background color-shading-type 'solid'