How do I add an icon to an executable file [duplicate]
Create a "Application_name.desktop" file using gedit or any other text editor with contents
[Desktop Entry]
Name=Application name
Exec=path-to-executable
Icon=path-to-icon
Terminal=false
Type=Applicationput it in ~/.local/share/applications
For complete documentation checkout https://help.ubuntu.com/community/UnityLaunchersAndDesktopFiles
Follow steps here
Your question is disscused in this thread. Check the answer !
https://askubuntu.com/a/450847/270059