ubuntu taskbar center
gsettings set org.gnome.shell.extensions.dash-to-dock extend-height false
gsettings set org.gnome.shell.extensions.dash-to-dock dock-position BOTTOM
gsettings set org.gnome.shell.extensions.dash-to-dock transparency-mode FIXED
gsettings set org.gnome.shell.extensions.dash-to-dock dash-max-icon-size 48
gsettings set org.gnome.shell.extensions.dash-to-dock unity-backlit-items true