... in the application list in the application list on linux
On gnome desktop (and maybe on other flavors), an application must have a .desktop file to be 'registered' as an application and appears in application launchers.
This file usually goes in ~/local/share/applications (user specific)
Here's a sample for Eclipse:
[Desktop Entry]
Version=1.0
Encoding=UTF-8
Name=Eclipse 3.8
Exec=/home/cran/Apps/eclipse/eclipse-3.8/eclipse
TryExec=/home/cran/Apps/eclipse/eclipse-3.8/eclipse
Comment=A full featured IDE
Terminal=false
Categories=Development;
Icon=/home/cran/Apps/eclipse/eclipse-3.8/eclipse.png
Type=Application