Restoration method after Linux pannel is deleted by mistake

I used Debian as the development environment and accidentally deleted the top panel. The recovery method is described as follows:
1. Click new panel on the undeleted panel at the bottom. in Linux, a panel is created to the top of the desktop.
2. Click Add to panel on the newly created panel to add the commonly used menul bar.
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Note: The above method applies to the case where the Panel is deleted by mistake, but the menu class library is not deleted. If the menu class library is also deleted, You need to reinstall it.
1. APT-cache search menu-xdg
2. APT-Cache Install Menu-xdg