Reload the Gnome or KDE Panels Without Restarting (Linux)

If you do a lot of tweaking to the panels in Gnome or KDE, you've probably run into an instance where you enabled a plugin or changed a setting and need to restart to see the effect (or maybe you locked something up). Instead of logging out or rebooting, we'll just reload the process.

In case you are wondering what the panel is, it's the process that handles everything you see on the screen here. (and all the rest of the toolbars and buttons too):