Add Application Icon

To add applications to the Dash (then you press the windows key), Go to ~/.local/share/applications and create your .desktop files there.

For example:

• Open Nautilus (also called Files (the file manager))
• Browse to ~/.local/share/applications (ctrl + h to show hidden folders/files)
• Right click and choose create empty document
• Name the file testing.desktop
• Enter in a valid desktop contents (sample below)
• Save it and now that entry will show when you press the windows key under applications.

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A much easier way…

sudo apt-get install alacarte

Then run alacarte and create menu entries as you like. They will show in the unity launcher.

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Sample desktop file (from sublime text 2)

#!/usr/bin/env xdg-open  

[Desktop Entry]
Version=1.0
Name=Sublime Text 2
# Only KDE 4 seems to use GenericName, so we reuse the KDE strings.
# From Ubuntu's language-pack-kde-XX-base packages, version 9.04-20090413.
GenericName=Text Editor
Exec=subl
Terminal=false
Icon="/opt/Sublime Text 2/Icon/48x48/sublime_text.png"
Type=Application
Categories=TextEditor;IDE;Development
X-Ayatana-Desktop-Shortcuts=NewWindow
Icon[en_US]=/opt/Sublime Text 2/Icon/128x128/sublime_text.png

[NewWindow Shortcut Group]
Name=New Window
Exec=subl -n
TargetEnvironment=Unity