how to achieve multi touch gestures in ubuntu 14.04

Yes, it is possible:

Installation

• install touchegg: sudo apt-get install touchegg

• install Touchegg-GCE: You have to git clone (or download) Touchegg-GCE from github and then manually compile it, it needs qt4 so sudo apt-get install qt4-dev-tools then open a terminal into the Touchegg-GCE directory and type /usr/bin/qmake-qt4 and make. Now launch touchegg-gce and configure your gestures.

  Autostart and configuration: into ~/.config/autostart/

• create an executable (chmod +x touch.sh) script touch.sh with the following code. It is necessary to disable the default behaviour of the trackpad for 2-3 fingers gestures

  #!/bin/bash
  synclient TapButton2=0
  synclient TapButton3=0
  synclient ClickFinger2=0
  synclient ClickFinger3=0
  synclient HorizTwoFingerScroll=0
  synclient VertTwoFingerScroll=0
  

• create two launchers: one for the script(1) and the other for touchegg(2).

  (1) touch.desktop

  [Desktop Entry]
  Type=Application
  Exec=/home/<user>/.config/autostart/touch.sh
  Hidden=false
  NoDisplay=false
  X-GNOME-Autostart-enabled=true
  Name[it_IT]=TouchScript
  Name=TouchScript
  Comment[it_IT]=Enable Touchegg 2-3 fingers
  Comment=Enable Touchegg 2-3 fingers
  

  (2) touchegg.desktop

  [Desktop Entry]
  Name=Touchegg
  GenericName=Touchégg
  Comment=Touchégg Gestures Manager
  Exec=/usr/bin/touchegg %u
  Terminal=false
  Type=Application
  Name[it_IT]=touchegg.desktop
  

I have not been able to get multitouch gestures support with touchegg on Unity. However, after installing Ubuntu Gnome 14.04, touchegg works like a charm.