Hi

I am using Ubuntu 14.04 LTS and desktop environment is unity. My problem is that on my top panel bottom to shutdown clock etc are disappeared. Please give what can I do to solve this problem.

Thanks

I don't have unity but you might try right clicking top panel. On the drop-down menu, go down to "panel" and on the new drop-down menu click on "add new items". Then click on "action button" (it might have a different name in Unity) which will place the name of the user on the top panel. When you click on the user name, you will have a few choices like "log out", "shut down", etc. The above works on xfce and Gnome desktops, and I imagine it will work on Unity as well.

If this does not work, you can use the terminal to shutdown.
and then hit the "Enter" key (after suppying your user password)

i think unity have done away with all this fancy right-clicking stuff as to not confuse the average user...
i think most systems' systemd's are configured to shutdown without password, so
(or something along those lines)
should suffice.

I have 14.04 with Unity in a VM. I can shutdown/logoff by clicking a little wheel-like icon in the upper right hand corner; a menu drops down with a number of options including shutdown.