Unity desktop of Ubuntu eat lot of computer resources. Install GNOME Flash back desktop.
apt-get install gnome-session-flashback
Log out from Ubuntu. In Login window select
GNOME Flashback (Compiz) is visual intensive. Select GNOME Flashback (Metacity) and login again.
When Ubuntu start up lot of unwanted applications and services beginning its work. User can disable it.
Open terminal and apply following command,
sudo sed --in-place 's/NoDisplay=true/NoDisplay=false/g' *.desktop
Next, open startup applications manager and uncheck unwanted applications at the start up. Some unwanted applications are:
Orca screen reader
Personal File Sharing
Check the swappiness first (e.g. 60)
Open following file and add new swap value.
Copy and paste the following lines at the end of the file.
# Decrease swap usage to a more reasonable level
The new value will be in effect after restart.
Disable visual effects
Go to settings manager and disable visual effects.
Disable Java in Libre Office
Libre Office Writer > Tools > Options
LibreOffice - Advanced - Java options:
Uncheck: Use a Java runtime environment
Bleach bit a useful tool to empty apt, cache etc. Very user friendly due to its GUI.
sudo apt-get install bleachbit
Install a Light weight Desktop
Choose a light weight Desktop for faster performance. Light weight desktops can give good performance than heavy desktops like Unity. LXDE, XFCE and MATE desktops can give good performance.
Apply following command to make available Lubuntu Desktop on Ubuntu Unity.
sudo apt-get install lubuntu-desktop