Instalando Gnome Classic en Ubuntu 15.10

Ctrl+alt+t

sudo apt-get install gnome-session-flashback

developer@ubuntu:~$ sudo apt-get install gnome-session-flashback
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following extra packages will be installed:
  alacarte gir1.2-panelapplet-5.0 gnome-applets gnome-applets-data
  gnome-flashback gnome-flashback-common gnome-media gnome-panel
  gnome-panel-data gnome-themes-standard gnome-themes-standard-data
  gstreamer0.10-gconf gstreamer0.10-plugins-base gstreamer0.10-plugins-good
  gstreamer0.10-pulseaudio gstreamer0.10-x gtk2-engines-pixbuf
  indicator-applet-complete libcpufreq0 libgstreamer-plugins-base0.10-0
  libgstreamer0.10-0 libpanel-applet0 metacity
Suggested packages:
  tomboy evolution-common desktop-base gstreamer0.10-tools
  gnome-control-center
The following NEW packages will be installed:
  alacarte gir1.2-panelapplet-5.0 gnome-applets gnome-applets-data
  gnome-flashback gnome-flashback-common gnome-media gnome-panel
  gnome-panel-data gnome-session-flashback gnome-themes-standard
  gnome-themes-standard-data gstreamer0.10-gconf gstreamer0.10-plugins-base
  gstreamer0.10-plugins-good gstreamer0.10-pulseaudio gstreamer0.10-x
  gtk2-engines-pixbuf indicator-applet-complete libcpufreq0
  libgstreamer-plugins-base0.10-0 libgstreamer0.10-0 libpanel-applet0 metacity
0 upgraded, 24 newly installed, 0 to remove and 0 not upgraded.
Need to get 11.9 MB of archives.
After this operation, 53.9 MB of additional disk space will be used.
Do you want to continue? [Y/n] y