Try this :
sudo apt-get install gnome-icon-theme-extras gnome-icon-theme gnome-icon-themes gnome-icon-theme-full syslinux-themes-ubuntu syslinux-common syslinux-themes-debian
Try this :
sudo apt-get install gnome-icon- theme-extras gnome-icon-theme gnome-icon-themes gnome-icon- theme-full syslinux- themes- ubuntu syslinux-common syslinux- themes- debian