Restart Xfce panel in Xubuntu

To restart the panel, open the terminal and run the following command:

xfce4-panel -r

Your changes should be visible now.

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The -r option stands for restart, as described in the man page:

-r, --restart

Restart the running panel instance

^{(Source: http://manpages.org/xfce4-panel)}

Sometimes I find that, xfce panel is gone. Therefore I need to restart the panel.

Above restart process do not work 100%. In my system, it cannot initialize session-buttons and other add-on(s).

To complete panel restart, just open the task manager and kill the xfce4-panel process. Don't worry. System will restart the panel just after is has been killed.