You can't "undelete" a panel you deleted, but you can re-create it...
Press ALT-F2 and enter cinnamon-settings
, then go to Panel and press the Add new panel
button, select the location for the new panel and select the position (top or bottom) and you will get a new blank panel.
Once you get the panel, add applets to it and select "Restore to defaults" which should restore the panel to it's original settings and applets. If not, you will need to add the applets manually, in general you will want to add:
Menu (the "start" button)
Calendar
Keyboard
Network Manager
Notifications (will not appear unless active notifications)
Panel Launchers (Quick Launch shortcuts)
Power Manager
Removable Drives (will not appear if there is no drive connected)
Show Desktop
Sound (volume)
System Tray (will not appear unless there are active items)
Window List (the tabs for running apps)
Windows Quick List
And optionally:
Bluetooth
User Applet
Workspace Switcher
Note that adding them manually will not place them in the correct position, so you may need to move them around a bit.
(perhaps there needs to be an undo) – Elliptical view – 2016-08-05T03:19:13.887