Is there any way to have files in desktop in Elementary Luna OS. I have checked and tried installing tweak but couldn't move the files to desktop.
Actually this function has deliberately been omitted from elementaryOS. It was a specific design choice. But you can at least enable My Computer or Trash bin.
With Pantheon (the default file manager in Luna) you can’t bring files or folders onto the desktop. But in Nautilus, it’s possible. Run
sudo apt-get install gnome-tweak-tool
and install it.
Then type the same
gnome-tweak-tool to launch it.
From the Desktop menu you can adjust the desktop to your liking. Check Have file manager handle the desktop and other options like display My Computer or Trash icon.
However, we need to make these changes boot with the OS. Go to the System Settings > Startup Applications > Add. Input the Name (Nautilus, for example) and type
nautilus -n in Command.