Unable to find Ubuntu Panel Bar/ Missing Panel Bar.. ??? Solved

• If you missed out your panel, and unable to find any any option to get it back. 
• If you don't able to Open the linux mint menu. 

Give a try to following steps:

If you're referring to gnome-panel however, you can restore it like so:

• Press Alt + F2 to open the Run Application dialog
• Select the terminal from the list and run it
• In terminal enter these 3 commands (each followed by Enter)

gconftool-2 --shutdown
rm -rf ~/.gconf/apps/panel
pkill gnome-panel